Man being towed behind a boat skiboarding at a high rate of speed.
man participates on watersports
Being towed is the same as participates with watersports
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & behind(e1,x3) & at(e2,x5) & of(x5,x6) & n_speed(x6) & n_rate(x5) & a_high(s1) & Theme(s1,x5) & Actor(e2,x4) & v_skiboard(e2) & (x3 = x4) & n_boat(x3) & Theme(e1,x2) & v_tow(e1) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_watersport(x3) & n_participate(x1) & of(x1,x2) & n_man(x2))