The cheerleader in red and white is sitting on the knee of a man also wearing red and white.
He is her grandfather.
The man doesn't have to be his or her grandfather, we don't know either is he or she
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 p1 x1 x2 x3.(n_grandfather(x3) & of(x3,x2) & n_female(x2) & n_male(x1) & (x1 = x3))