Person sitting at a desk in a library.
The person is studying for school.
Just because a person is sitting at a desk in a library, that person does not have to be studying for school.
exists e1 x1 x2 x3.(ne_nam_person(x1) & in(e1,x3) & n_library(x3) & at(e1,x2) & n_desk(x2) & Actor(e1,x1) & v_sit(e1))
exists e1 x1 x2.(n_person(x1) & for(e1,x2) & n_school(x2) & Actor(e1,x1) & v_study(e1))