Two men in blue and black vests are being pulled in rafts through the water.
The men are wearing green vests.
If the vests are blue and black, they cannot be green.
exists e1 s1 s2 x1 x2 x3 x4.(n_water(x4) & through(e1,x4) & in(e1,x3) & n_raft(x3) & Theme(e1,x1) & v_pull(e1) & in(x1,x2) & n_vest(x2) & a_black(s2) & Theme(s2,x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_vest(x2) & a_green(s1) & Theme(s1,x2))