Two men sleep while traveling.
There are men resting.
If the men sleep they are resting.
exists e1 e2 x1.(while(e1,e2) & Actor(e2,x1) & v_travel(e2) & Actor(e1,x1) & v_sleep(e1) & n_man(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_rest(e1) & (x2 = x3) & n_man(x2))