The cheerleader in red and white is sitting on the knee of a man also wearing red and white.
A cheerleader is sitting on her boyfriend.
Sitting on the mans leg does not mean he's her boyfriend. Depending on her age it may even be her father.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5.(n_knee(x3) & n_cheerleader(x1) & on(e1,x3) & of(x3,x4) & a_also(s2) & Manner(e2,s2) & exists s3 s4.(Theme(s4,x5) & a_white(s4) & Theme(s3,x5) & a_red(s3)) & Topic(e2,p1) & Actor(e2,x5) & v_wear(e2) & (x4 = x5) & n_man(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_white(x2) & a_red(s1) & Theme(s1,x2))
exists e1 x1 x2.(on(e1,x2) & n_boyfriend(x2) & of(x2,x1) & n_female(x1) & Actor(e1,x1) & v_sit(e1) & n_cheerleader(x1))