A man lays back on his scooter.
a man is on his scooter.
A man lays back on his scooter means the man is on his scooter.
exists e1 s1 x1 x2.(on(e1,x2) & n_scooter(x2) & of(x2,x1) & n_male(x1) & a_back(s1) & Manner(e1,s1) & Actor(e1,x1) & v_lay(e1) & n_man(x1))
exists p1 x1 x2.(on(x1,x2) & n_scooter(x2) & of(x2,x1) & n_male(x1) & n_man(x1))