A happy man in a blue collared shirt is typing on his computer.
Someone is typing on a computer.
A man is someone, so therefore he is typing on a computer.
exists e1 s1 s2 s3 x1 x2 x3.(on(e1,x3) & n_computer(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_type(e1) & in(x1,x2) & n_shirt(x2) & a_collared(s3) & Theme(s3,x2) & a_blue(s2) & Theme(s2,x2) & n_man(x1) & a_happy(s1) & Theme(s1,x1))
exists e1 x1 x2.(on(e1,x2) & n_computer(x2) & Actor(e1,x1) & v_type(e1) & n_person(x1))