There is a man swimming with a child.
A man and child are taking a swim.
"A man swimming with a child" is a rephrasing of "A man and child are taking a swim."
exists p1 x1 x2 x3 x4.((x1 = x2) & with(x2,x4) & n_child(x4) & n_swimming(x2) & of(x2,x3) & n_man(x3))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_swim(x4) & n_child(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))