People looking at fish at an aquarium.
People looking at fish for a school project.
People looking at fish in an aquarium doesn't imply those people are doing a school project.
exists e1 x1 x2 x3.(at(e1,x2) & at(x2,x3) & n_aquarium(x3) & n_fish(x2) & Actor(e1,x1) & v_look(e1) & n_people(x1))
exists e1 x1 x2 x3 x4.(at(e1,x2) & for(x2,x3) & n_project(x3) & of(x3,x4) & n_school(x4) & n_fish(x2) & Actor(e1,x1) & v_look(e1) & n_people(x1))