A boy in blue jeans is playing with a toy car on the lawn.
a boy plays with a toy car on the grass
Sentence 2 confirms that the boy is playing with a toy car.
exists e1 s1 x1 x2 x3 x4 x5.(n_lawn(x5) & on(e1,x5) & with(e1,x3) & n_car(x3) & of(x3,x4) & n_toy(x4) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_jeans(x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3 x4.(n_grass(x4) & with(e1,x2) & on(x2,x4) & n_car(x2) & of(x2,x3) & n_toy(x3) & Actor(e1,x1) & v_play(e1) & n_boy(x1))