Some cows cluster together.
The cows are writing their penpal a letter
Cows that cluster together are doing animal things, not human things like writing a penpal.
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_cluster(e1) & n_cow(x1))
exists x1 x3.(n_penpal(x3) & of(x3,x1) & n_thing(x1) & n_cow(x1) & all x2.(n_letter(x2) -> exists e1.(Theme(e1,x3) & Actor(e1,x1) & v_write(e1) & for(x3,x2))))