A small child, sitting on the floor, is getting their teeth brushed.
A kid gets their teeth cleaned.
A small child is called a kid, and the brushing of teeth is a form of tooth cleaning.
exists e3 e1 e2 s1 x1 x2 x3 x4 x5.(n_tooth(x4) & of(x4,x3) & n_thing(x3) & n_floor(x3) & Theme(e3,x4) & Actor(e3,x1) & v_get(e3) & Theme(e2,x5) & v_brush(e2) & (x4 = x5) & on(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_child(x1) & a_small(s1) & Theme(s1,x1))
exists e2 e1 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_get(e2) & Theme(e1,x3) & v_clean(e1) & (x2 = x3) & n_tooth(x2) & of(x2,x1) & n_thing(x1) & n_kid(x1))