Two workers holding up the tree look around, while the other two work hard with their shovels.
Half of the men are shoveling snow.
There are two men plus the other two men, making the other two half of the men total. They do not contradict each other.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_shovel(x6) & of(x6,x3) & n_thing(x3) & -(x5 = x5) & n_work(x5) & card_eq_2(x5) & n_look(x3) & of(x3,x4) & n_tree(x4) & a_topic(x1) & with(e1,x6) & a_hard(s2) & Manner(e1,s2) & while(e1,x5) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & r_around(x3) & (x1 = x2) & n_worker(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_man(x2) & Theme(e1,x3) & Actor(e1,x1) & v_shovel(e1) & n_snow(x3) & of(x1,x2) & n_half(x1))