A group of men in the water.
there is a group of young peple trying to learn swiming
A group of men should have been extracted from a group of young people.
exists x1 x2 x3.(n_water(x3) & a_topic(x1) & of(x1,x2) & in(x2,x3) & n_man(x2) & n_group(x1))
exists p1 x1 e1 p2 s1 x2 x3 x4.((x1 = x2) & Topic(e1,p2) & Actor(e1,x4) & v_try(e1) & exists e2 x5.(Theme(e2,x5) & Actor(e2,x4) & v_learn(e2) & n_swime(x5)) & (x2 = x4) & of(x2,x3) & n_peple(x3) & a_young(s1) & Theme(s1,x3) & n_group(x2))