How to get to know a girl on facebook<br>Have an interaction with the girl in person before you take it to facebook. This doesn't need to be a long conversation or a date or anything, but make sure she knows who you are. Make eye contact and smile, ask her about the homework, get a friend to introduce you.
You must ask a girl about her homework before you add her on facebook.
It is hard because the last sentence is a list of suggestions. But it's hard for a computer to know if it's a list of suggestions and not a list of necessary things you must do. Whether it's mandatory (a "must") or optional is defined by the context of the earlier sentence.
( z1 obligate :ARG1 ( z2 you ) :ARG2 ( z3 ask :ARG0 z2 :ARG1 ( z4 homework :poss ( z5 girl :ARG2-of z3 ) ) :time ( z6 before :op ( z7 add :ARG0 z2 :ARG1 z5 :ARG2 ( z8 publication :name ( z9 name :op "Facebook" ) ) ) ) ) )