He is working in the university lab.
He's working on his science project in the lab.
Not all persons working in the university lab is working on a science project.
exists e1 x1 x2 x3.(n_lab(x2) & of(x2,x3) & n_university(x3) & n_male(x1) & in(e1,x2) & Actor(e1,x1) & v_work(e1))
exists e1 x1 x2 x3 x4.(n_lab(x4) & n_project(x2) & of(x2,x3) & n_science(x3) & of(x2,x1) & n_male(x1) & n_male(x1) & on(e1,x2) & in(x2,x4) & Actor(e1,x1) & v_work(e1))