Two men swimming on a lake.
Two men swimming and talking in the water.
It can't be inferred they're talking.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_lake(x3) & Actor(e1,x2) & v_swim(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(n_water(x4) & a_topic(s1) & subset_of(e1,s1) & in(e1,x4) & Actor(e1,x3) & v_talk(e1) & n_thing(x3) & subset_of(x1,s1) & n_swimming(x1) & of(x1,x2) & n_man(x2) & card_eq_2(x1))