There is a artist completing a large piece of work.
An artist working on a large clay sculpture.
The artist is completing a large piece of work but that doesn't necessarily mean that the piece of work is a clay sculpture.
exists p1 x1 e1 s1 x2 x3 x4 x5.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_complete(e1) & of(x4,x5) & n_work(x5) & n_piece(x4) & a_large(s1) & Theme(s1,x4) & (x2 = x3) & n_artist(x2))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_sculpture(x3) & of(x3,x4) & n_clay(x4) & a_large(s1) & Theme(s1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_artist(x1))