Two men in baseball hats and bright yellow shirts work behind a fence.
Two men work on digging up something behind a fence.
The fact that people work behind a fence does not imply they are digging up something.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(behind(e1,x6) & n_fence(x6) & Actor(e1,x1) & v_work(e1) & in(x1,x2) & subset_of(x5,x2) & n_shirt(x5) & a_yellow(s2) & Theme(s2,x5) & a_bright(s1) & Theme(s1,x5) & subset_of(x3,x2) & n_hat(x3) & of(x3,x4) & n_baseball(x4) & n_man(x1) & card_eq_2(x1))
exists e1 e2 s1 x1 x2 x3 x4.(on(e1,e2) & a_up(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x2) & v_dig(e2) & behind(x3,x4) & n_fence(x4) & n_thing(x3) & Actor(e1,x1) & v_work(e1) & n_man(x1) & card_eq_2(x1))