A collocation is an arbitrary and recurrent word combination.
Non-compositional, or non-deterministically compositional.
Domain dependent: "buy short"
p(...red herring...) >> p(...red...) * p(...herring...)
The spike condition eliminates pairs such as telephone-television,
big-small, doctor-nurse etc.
Concordances of bigrams per distance; template generation
Tag elements of collocations
Parse and extract head+modifier pairs:
head and mod contexts