A group of people rowing a boat.
A group of people are competing in a rowing contest.
A group of people rowing a boat does not mean they are in a rowing contest.
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_row(e1) & n_boat(x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(in(e1,x3) & n_contest(x3) & of(x3,x4) & n_rowing(x4) & Actor(e1,x1) & v_compete(e1) & of(x1,x2) & n_people(x2) & n_group(x1))