A redheaded boy swimming underwater.
A girl swimming underwater
A boy is considered male, while a girl is considered female, and are not typically identifiable as both concurrently.
exists s1 x1 x2 x3.(a_topic(x1) & n_underwater(x1) & of(x1,x3) & n_swimming(x3) & of(x1,x2) & n_boy(x2) & a_redheaded(s1) & Theme(s1,x1))
exists x1 x2 x3.(a_topic(x1) & n_underwater(x1) & of(x1,x3) & n_swimming(x3) & of(x1,x2) & n_girl(x2))