A man in a blue shirt driving a Segway type vehicle.
The man is riding a bike.
the man is either riding a bike or driving a segway type vehicle.  these are two different modes of transportation
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_drive(e1) & n_vehicle(x4) & of(x4,x6) & n_type(x6) & of(x4,x5) & n_segway(x5) & (x2 = x3) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2))