premise: A group of men in the water.
hypothesis: there are some people sunk in river
explanation_1: Just because people are in water doesn't mean they have sunk.  Not all bodies of water are rivers.
premise_logic: exists x1 x2 x3.(n_water(x3) & a_topic(x1) & of(x1,x2) & in(x2,x3) & n_man(x2) & n_group(x1))
hypothesis_logic: exists p1 x1 e1 x2 x3 x4.((x1 = x2) & in(e1,x4) & n_river(x4) & Theme(e1,x3) & v_sink(e1) & (x2 = x3) & n_people(x2))
premise_sim: exists x1 x2 x3.(of(x1,x2) & n_water(x3) & n_man(x2) & n_group(x1) & in(x2,x3) & a_topic(x1))
hypothesis_sim: exists x1 e1 x2 x3 x4.(v_sink(e1) & n_river(x4) & n_people(x2) & in(e1,x4) & Theme(e1,x3) & (x2 = x3) & (x1 = x2))