A man in a blue coat is walking on the sidewalk.
A person is walking on the sidewalk.
WE DON'T KNOW THAT THE MAN IS A PERSON.
exists e1 s1 x1 x2 x3.(n_sidewalk(x3) & on(e1,x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_coat(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_sidewalk(x2) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_person(x1))