A boy jumps off a tan rock.
A boy is jumps off a white rock.
The boy either jumps off a tan rock or a white rock.
exists e1 s1 s2 x1 x2.(a_off(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_rock(x2) & a_tan(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 s1 x1 x2.(off(e1,x2) & n_rock(x2) & a_white(s1) & Theme(s1,x2) & Theme(e1,x1) & v_jump(e1) & n_boy(x1))