A young cowboy is mesmerized by the presence of a camel.
A cowboy sings by a fire.
The cowboy cannot be mesmerized by a camel and singing at the same time.
exists e1 s1 x1 x2 x3.(n_presence(x2) & Actor(e1,x2) & of(x2,x3) & n_camel(x3) & Theme(e1,x1) & v_mesmerize(e1) & n_cowboy(x1) & a_young(s1) & Theme(s1,x1))
exists x1 x2 x3.(a_topic(x1) & by(x1,x3) & n_fire(x3) & n_sing(x1) & of(x1,x2) & n_cowboy(x2))