lHead:
most important word syntactically and semantically.
ˇFilter is
the head of coffee filter, oil filter, etc
lSimplex
NPs (SNP) are identified instead of Complex NP (CNP)
ˇ“A form”
and “cancer causing asbestos” are two SNP
ˇ“A form of
cancer causing asbestos” is a CNP.
lNPs
are sorted by head in terms of their significances (frequency)