There are a couple of old men sitting on a concrete bench outside.
A couple of old men are swimming in a pool
The men cannot be swimming and sitting at the same time.
exists p1 x1 e1 s1 s2 x2 x3 x4 x5 x6.((x1 = x2) & on(e1,x5) & n_outside(x5) & of(x5,x6) & n_bench(x6) & a_concrete(s2) & Theme(s2,x5) & Actor(e1,x4) & v_sit(e1) & (x2 = x4) & of(x2,x3) & n_man(x3) & a_old(s1) & Theme(s1,x3) & n_couple(x2))
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_pool(x3) & Actor(e1,x1) & v_swim(e1) & of(x1,x2) & n_man(x2) & a_old(s1) & Theme(s1,x2) & n_couple(x1))