A crowd is gathered in a large outdoor public space.
The outdoor public space is empty.
A space can not have a crowd and be empty at the same time.
exists e1 s1 s2 s3 x1 x2.(in(e1,x2) & n_space(x2) & a_public(s3) & Theme(s3,x2) & a_outdoor(s2) & Theme(s2,x2) & a_large(s1) & Theme(s1,x2) & Theme(e1,x1) & v_gather(e1) & n_crowd(x1))
exists s1 s2 s3 x1.(n_space(x1) & a_public(s2) & Theme(s2,x1) & a_outdoor(s1) & Theme(s1,x1) & Theme(s3,x1) & a_empty(s3))