A man in a yellow shirt uses a saw on wooden boards.
A man is using a tool to cut boards
A saw is a tool. You only use this tool to cut, so using it on wooden boards implies using it to cut boards.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_use(e1) & on(x3,x4) & n_board(x4) & a_wooden(s2) & Theme(s2,x4) & n_saw(x3) & in(x1,x2) & n_shirt(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists e1 p1 x1 x2.(Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_cut(e2) & n_board(x3)) & n_tool(x2) & n_man(x1))