A man in a white hard hat is standing in front of a green truck.
There is a man working.
A man in a hard hat and in front of a truck must be working.
exists e1 s1 s2 s3 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_truck(x4) & a_green(s3) & Theme(s3,x4) & n_front(x3) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_hat(x2) & a_hard(s2) & Theme(s2,x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_man(x2))