A group of people rowing on a lake.
tourists are enjoying water
"Tourists" are a "group of people," and a lake is a body of water
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & on(e1,x4) & n_lake(x4) & Actor(e1,x3) & v_row(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_water(x2) & n_tourist(x1))