A very very wide roller coaster trundles down the track.
A merry-go-round spins at a fair.
It's either a wide roller coaster or a merry-go-round, not both.
exists e1 s1 s2 x1 x2 x3.(n_track(x3) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_trundle(e1) & n_coaster(x1) & of(x1,x2) & n_roller(x2) & a_wide(s1) & Theme(s1,x1) & r_very(x1) & r_very(x1))
exists s1 x1 x2.(a_topic(x1) & at(x1,x2) & n_fair(x2) & n_spin(x1) & a_merry-go-round(s1) & Theme(s1,x1))