A man riding a bicycle down the street.
The man rides a bike.
A man riding a bicycle rides a bike.
exists e1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & down(x1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2))