A man in an orange hard hat and vest looks at an object in his hand while the man next to him stands on a ladder in order to reach the ceiling.
The men are swimming at the pool.
Both men cannot be swimming at the pool if one is standing on a ladder.
(x)
exists e1 x1 x2.(n_pool(x2) & n_man(x1) & at(e1,x2) & Actor(e1,x1) & v_swim(e1))