a boy in a blue shirt is walking along a tan and blue wall
A person wearing a shirt is walking.
A boy is a person, and "wearing a shirt" is a rephrasing of "in a blue shirt.
exists e1 s1 s2 s3 x1 x2 x3.(along(e1,x3) & n_wall(x3) & a_blue(s3) & Theme(s3,x3) & a_tan(s2) & Theme(s2,x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1))
exists e2 e1 x1 x2 x3.(Actor(e2,x1) & v_walk(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & (x1 = x2) & n_person(x1))