A red airplane is flying by a large ship.
An airplane and a ship are part of a convoy.
An airplane and a ship next to one another are not necessarily part of a convoy.
exists e1 s1 s2 x1 x2.(by(e1,x2) & n_ship(x2) & a_large(s2) & Theme(s2,x2) & Actor(e1,x1) & v_fly(e1) & n_airplane(x1) & a_red(s1) & Theme(s1,x1))
exists p1 x1 x2 x3.(exists x4 x5.((x1 = x4) & of(x4,x5) & n_convoy(x5) & n_part(x4)) & subset_of(x3,x1) & n_ship(x3) & subset_of(x2,x1) & n_airplane(x2))