A person rides a bike down a rocky hill.
A man rides his bike around the neighborhood.
A person riding a bike isn't necessarily a man.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_hill(x3) & a_rocky(s1) & Theme(s1,x3) & n_bike(x2) & n_person(x1))
exists e1 x1 x2 x3.(n_neighborhood(x3) & around(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_man(x1))