Two men in yellow safety vests and hard hats are working on a piece of heavy machinery.
Two people building a house
two men in yellow safety vests are not necessarily building a house
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(on(e1,x6) & of(x6,x7) & n_machinery(x7) & a_heavy(s3) & Theme(s3,x7) & n_piece(x6) & Actor(e1,x1) & v_work(e1) & in(x1,x2) & n_hat(x5) & a_hard(s2) & Theme(s2,x5) & n_vest(x4) & subset_of(x5,x2) & subset_of(x4,x2) & of(x2,x3) & n_safety(x3) & a_yellow(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_build(e1) & n_house(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))