An artist is doing clay work.
There is one person in this picture.
An artist is a person, and if it is depicting only an artist, then there is one person.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_work(x2) & of(x2,x3) & n_clay(x3) & n_artist(x1))
exists p1 x1 x3.(n_picture(x3) & exists x2.((x1 = x2) & in(x2,x3) & n_person(x2) & card_eq_1(x2)))