Two contractors at work behind a white mailbox.
Two men laying foundation near a mailbox.
Work behind does not mean laying foundation.
exists s1 x1 x2 x3.(a_topic(x1) & behind(x1,x3) & n_mailbox(x3) & a_white(s1) & Theme(s1,x3) & at(x1,x2) & n_work(x2) & n_contractor(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_lay(e1) & near(x3,x4) & n_mailbox(x4) & n_foundation(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))