A man drives a large truck.
A man is driving his new sports car.
The pieces of information that contradict each other are mention of man driving sports car as against man in first sentence driving large truck.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_truck(x2) & a_large(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_car(x2) & of(x2,x3) & n_sport(x3) & a_new(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_man(x1))