A man in white shirt and metal helmet parking his bike next to some cars.
A man in a white shirt is unparking his bike.
One cannot be parking and unparking simultaneously.
(x)
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_unpark(e1) & n_bike(x3) & of(x3,x1) & n_male(x1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))