diff --git a/.gitignore b/.gitignore
index 011f314..1cf96d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,7 @@
 .vscode
 *.cov
 res/*/*
-address_compare
-guxiang_animation
+address_compare*
+guxiang_animation*
 /*.png
 test/*.jpg
diff --git a/Project.toml b/Project.toml
index 26cfd20..8b7c6fb 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "WordCloud"
 uuid = "6385f0a0-cb03-45b6-9089-4e0acc74b26b"
 authors = ["guoyongzhi <momoshanghan@163.com>"]
-version = "0.3.1"
+version = "0.3.2"
 
 [deps]
 ColorSchemes = "35d6a980-a343-548e-a6ea-1d62b119f2f4"
diff --git a/README.md b/README.md
index d8d7df5..b630ca9 100644
--- a/README.md
+++ b/README.md
@@ -40,9 +40,9 @@ paint(wc, "alice.png", ratio=0.5, background=outline(wc.mask, color="purple", li
 [Training animation](./examples/animation.jl)  
 *Run the command `runexample(:animation)` or `showexample(:animation)` to get the result.* 
 ## Specifies the style of a particular word
-![specifystyle](res/specifystyle.png)  
-[Specifies the style of a particular word](./examples/specifystyle.jl)  
-*Run the command `runexample(:specifystyle)` or `showexample(:specifystyle)` to get the result.* 
+![specifiedstyle](res/specifiedstyle.png)  
+[Specifies the style of a particular word](./examples/specifiedstyle.jl)  
+*Run the command `runexample(:specifiedstyle)` or `showexample(:specifiedstyle)` to get the result.* 
 ## Comparison
 ![compare](res/compare.png)  
 [Comparison of Obama's and Trump's inaugural address](./examples/compare.jl)  
diff --git a/examples/alice.jl b/examples/alice.jl
index ff7776f..a91ccda 100644
--- a/examples/alice.jl
+++ b/examples/alice.jl
@@ -5,6 +5,6 @@ wc = wordcloud(
     colors = :Set1_5,
     angles = (0, 90),
     fillingrate = 0.7) |> generate!
-println("save results to alice.png")
+println("results are saved to alice.png")
 paint(wc, "alice.png", background=outline(wc.mask, color="purple", linewidth=1))
 wc
\ No newline at end of file
diff --git a/examples/animation.jl b/examples/animation.jl
index fab4370..681997d 100644
--- a/examples/animation.jl
+++ b/examples/animation.jl
@@ -3,11 +3,11 @@ using DataFrames
 using WordCloud
 
 df = CSV.File(pkgdir(WordCloud)*"/res/guxiang_frequency.txt", header=false)|> DataFrame;
-texts = df[!, "Column2"]
+words = df[!, "Column2"]
 weights = df[!, "Column3"]
 
-wc = wordcloud(texts, weights, fillingrate=0.8)
-println("save results to guxiang_animation")
+wc = wordcloud(words, weights, fillingrate=0.8)
 gifdirectory = "guxiang_animation"
 generate_animation!(wc, 100, outputdir=gifdirectory)
+println("results are saved in guxiang_animation")
 wc
\ No newline at end of file
diff --git a/examples/trainermetric.jl b/examples/benchmark.jl
similarity index 100%
rename from examples/trainermetric.jl
rename to examples/benchmark.jl
diff --git a/examples/compare.jl b/examples/compare.jl
index aaf497c..6b8b4ce 100644
--- a/examples/compare.jl
+++ b/examples/compare.jl
@@ -57,7 +57,7 @@ mb = paint(wcb)
 h,w = size(ma)
 space = fill(mb[1], (h, w÷20))
 try mkdir("address_compare") catch end
-println("save results to address_compare")
+println("results are saved in address_compare")
 WordCloud.ImageMagick.save("address_compare/compare.png", [ma space mb])
 
 gif = WordCloud.GIF("address_compare")
diff --git a/examples/specifystyle.jl b/examples/specifiedstyle.jl
similarity index 91%
rename from examples/specifystyle.jl
rename to examples/specifiedstyle.jl
index b21c36b..01d57ae 100644
--- a/examples/specifystyle.jl
+++ b/examples/specifiedstyle.jl
@@ -18,6 +18,6 @@ pin(wc, "Alice in Wonderland") do
     generate!(wc)
 end
 
-println("save results to specifystyle.png")
-paint(wc, "specifystyle.png")
+println("results are saved to specifiedstyle.png")
+paint(wc, "specifiedstyle.png")
 wc
\ No newline at end of file
diff --git a/src/nlp.jl b/src/nlp.jl
index 0e03e6c..cf16e31 100644
--- a/src/nlp.jl
+++ b/src/nlp.jl
@@ -48,8 +48,12 @@ function process(counter::Dict{<:AbstractString, <:Number};
     maxnum=500,
     minweight=1/maxnum, maxweight=minweight*20)
     stopwords = Set(stopwords)
+    println("$(sum(values(counter))) words")
+    println("$(length(counter)) different words")
     for (w, c) in counter
-        if (c < minfrequency || length(w) < minlength || length(w) > maxlength || lowercase(w) in stopwords) 
+        if (c < minfrequency 
+            || length(w) < minlength || length(w) > maxlength 
+            || lowercase(w) in stopwords || w in stopwords)
             delete!(counter, w)
         end
     end
diff --git a/src/rendering.jl b/src/rendering.jl
index 980d4e3..d66629b 100644
--- a/src/rendering.jl
+++ b/src/rendering.jl
@@ -192,6 +192,7 @@ function try_gif_gen(gifdirectory; framerate=4)
             -i $(gifdirectory)/result-palette.png -lavfi paletteuse -y $(gifdirectory)/result.gif`,
             stdout=devnull, stderr=devnull) |> run
     catch e
+        @warn "You need to have FFmpeg manually installed to use this function."
         @warn e
     end
 end
diff --git a/src/train.jl b/src/train.jl
index 41a0d55..94263f1 100644
--- a/src/train.jl
+++ b/src/train.jl
@@ -355,7 +355,8 @@ function teleport!(ts, maskqt, collpool, args...; kargs...)
 end
 
 function train!(ts, maskqt, nepoch::Number=-1, args...; 
-        trainer=trainepoch_EM2!, patient::Number=trainer(:patient), callbackstep=0, callbackfun=x->x, kargs...)
+        trainer=trainepoch_EM2!, patient::Number=trainer(:patient), optimiser=Momentum(η=1/4, ρ=0.5), 
+        callbackstep=0, callbackfun=x->x, kargs...)
     ep = 0
     nc = 0
     count = 0
@@ -373,7 +374,7 @@ function train!(ts, maskqt, nepoch::Number=-1, args...;
     @show nepoch, patient
     while ep < nepoch
 #         @show "##", ep, nc, length(collpool), (count,nc_min)
-        nc = trainer(ts, maskqt, args...; resource..., kargs...)
+        nc = trainer(ts, maskqt, args...; resource..., optimiser=optimiser, kargs...)
         ep += 1
         count += 1
         if nc < nc_min