An Asian teenage boy in a pink and black jacket walks with a teenage girl in a brown jacket.
Two teenagers are walking together.
A boy and a girl that are both teenagers could be described more easily as two teenagers. If two people are walking with each other than you could also say that they are walking together.
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(with(e1,x4) & in(x4,x6) & n_jacket(x6) & a_brown(s4) & Theme(s4,x6) & n_girl(x4) & of(x4,x5) & n_teenage(x5) & Actor(e1,x1) & v_walk(e1) & in(x1,x3) & n_jacket(x3) & a_black(s3) & Theme(s3,x3) & a_pink(s2) & Theme(s2,x3) & n_boy(x1) & of(x1,x2) & n_teenage(x2) & a_asian(s1) & Theme(s1,x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_teenager(x1) & card_eq_2(x1))