A single person rowing a small boat on a lake.
There are several people in a small boat.
There can either single person or several people
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_row(e1) & on(x3,x4) & n_lake(x4) & n_boat(x3) & a_small(s2) & Theme(s2,x3) & (x1 = x2) & n_person(x1) & a_single(s1) & Theme(s1,x1))
exists p1 s1 x1 x2.(in(p1,x2) & n_boat(x2) & a_small(s1) & Theme(s1,x2) & exists s2 x3.((x1 = x3) & n_people(x3) & a_several(s2) & Theme(s2,x3)))