Mothers tend to their children at a picnic table.
A mother washing dishes.
Tend to their children is not washing dishes.
exists e1 x1 x2 x3 x4.(to(e1,x2) & at(x2,x3) & n_table(x3) & of(x3,x4) & n_picnic(x4) & n_child(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_tend(e1) & n_mother(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wash(e1) & n_dish(x3) & (x1 = x2) & n_mother(x1))