A teen in a green shirt laughs, while a girl with a yellow sweater, and a pink, plastic tiara, holds a balloon.
A boy is laughing at his sister and her attire.
A teen who laughs while a girl with a yellow sweater and plastic tiara holds a balloon is not necessarily laughing at his sister and her attire.
exists p1 p2 p3 s1 x1 x2 x3.(rel(p1,x1) & in(x1,x2) & n_laugh(x2) & of(x2,x3) & n_shirt(x3) & a_green(s1) & Theme(s1,x2) & n_teen(x1) & exists x9.n_event(x9) & exists e1 s2 s3 s4 s5 x4 x5 x6 x7 x8.(Theme(e1,x8) & Actor(e1,x4) & v_hold(e1) & n_balloon(x8) & with(x4,x5) & subset_of(x7,x5) & n_tiara(x7) & a_plastic(s5) & Theme(s5,x7) & a_,(s4) & Theme(s4,x7) & a_pink(s3) & Theme(s3,x7) & subset_of(x6,x5) & n_sweater(x6) & a_yellow(s2) & Theme(s2,x6) & n_girl(x4)) & while(p2,p3))
exists e1 x1 x2 x3 x4.(at(e1,x2) & subset_of(x4,x2) & n_attire(x4) & of(x4,x3) & n_female(x3) & subset_of(x3,x2) & n_sister(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_laugh(e1) & n_boy(x1))