Oh boy, oh boy!! Let's do some grammar induction!
You can read about it, but it's like out of this world. http://sist.shanghaitech.edu.cn/faculty/tukw/nips13.pdf
Extract jAOG, and use this script to generate a grammar
$ SentencesToGrammar.sh sentences.txt grammar.txt
Visualize it with
grammar_viz.py. I totally messed up writing that visualization code. The order of AND nodes is important, but that isn't guaranteed when graphviz draws arbitrary graphs. Woops :O