An elderly man working with several lines of string.
The man is making knots.
It cannot be inferred that the man is making knots with the string.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(e1,x3) & of(x3,x4) & n_string(x4) & n_line(x3) & a_several(s2) & Theme(s2,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_knot(x2))