A group of people are sitting on the top of a boat.
The boat is big enough for a group of people.
Since the group of people are sitting in a boat, the boat has to be  big enough to accommodate them.
exists e1 x1 x2 x3 x4.(n_top(x3) & on(e1,x3) & of(x3,x4) & n_boat(x4) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 s2 x1 x2 x3.(n_boat(x1) & a_enough(s2) & Manner(s1,s2) & for(s1,x2) & of(x2,x3) & n_people(x3) & n_group(x2) & Theme(s1,x1) & a_big(s1))