Motorcycle racers take a sharp turn.
go kart racers drive in a straight line
Motorcycle and kart are different vehicles. One cannot take a turn in a straight line.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_turn(x3) & a_sharp(s1) & Theme(s1,x3) & n_racer(x1) & (x1 = x2) & ne_nam_motorcycle(x2))
exists e1 s1 s2 x1 x2 x3 x4.(in(e1,x4) & n_line(x4) & a_straight(s2) & Theme(s2,x4) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_drive(x2) & of(x2,x3) & n_racer(x3) & a_kart(s1) & Theme(s1,x2) & n_thing(x1))