A group of people enjoying an outing on a boat.
TWO PEOPLE ARE RIDING A MOTORCYCLE
A group of people implies more than two people. A boat isn't a motorcycle.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_enjoy(e1) & on(x4,x5) & n_boat(x5) & n_outing(x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists s1 x1 x2 x3 x4 x5.(ne_nam_motorcycle(s1) & (s1 = x5) & ne_nam_a(x5) & (s1 = x4) & ne_nam_riding(x4) & (s1 = x3) & ne_nam_are(x3) & (s1 = x2) & ne_nam_people(x2) & (s1 = x1) & ne_nam_two(x1) & a_topic(s1))