• Clockwise from top left, the 3 lines are labeled k, r, and s.
• Line k intersects both line r and line s.
• At the intersection of line k and line r, 2 angles are labeled clockwise from top left as follows:
  
  • Top right: w°
  • Bottom right: x°
• At the intersection of line k and line s, 2 angles are labeled clockwise from top left as follows:
  
  • Top right: y°
  • Bottom right: z°
• A note indicates the figure is not drawn to scale.

In the figure shown, line $k$ intersects lines $r$ and $s$. If $w=147$, which additional piece of information is sufficient to prove that lines $r$ and $s$ are parallel?