Two women working in a lab with paper on the lab table.
Two students working on their lab project.
Not all women working in a lab are students and just because they have paper on a table doesn't mean they are working on a lab project
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x5) & n_table(x5) & of(x5,x3) & n_lab(x3) & n_lab(x3) & with(e1,x4) & n_paper(x4) & in(e1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_woman(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_project(x3) & of(x3,x4) & n_lab(x4) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_student(x1) & card_eq_2(x1))