When trying to parse Los gatos ladran:
Mysteriously, in that chart, the appropriate edge for the token gatos, a native lexical entry for a plural common noun, is missing:
The highlighted thing is (a) something that originates from a generic lexical entry; and (b) something that underwent a rule which made it require a complement (NOTE! This is a rule similar to the one missing from the chart here!). So the head-specifier rule cannot apply, since the complement is missing.
In the grammar, I have of course:
ncmp000 := %suffix (ncmp000 ncmp000) n_masc-pl_ilr.
I also of course have the lexical entry:
n_-_c_native_le := n_-_c_lex & native_le """ This is a native lexical entry type, for words that are in the lexicon. """.
The corresponding sentence with a singular subject parses:
why could this be?