An older man with gray hair and a white baseball hat is hunched over and his head is on his knees.
A person is sitting.
The only way you could have your head on your knees is if you are sitting.
exists e1 p1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7.(on(x6,x7) & n_knee(x7) & of(x7,x1) & n_male(x1) & n_male(x1) & n_head(x6) & of(x6,x1) & a_over(s4) & Manner(e1,s4) & Theme(e1,x1) & v_hunch(e1) & with(x1,x2) & subset_of(x4,x2) & n_hat(x4) & of(x4,x5) & n_baseball(x5) & a_white(s3) & Theme(s3,x4) & subset_of(x3,x2) & n_hair(x3) & a_gray(s2) & Theme(s2,x3) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))