Label are not all standard, each LRU can use custom values.

Here is a non-authoritative list of some labels:

 - [ARINC 429 Labels][1]

There is no yaw label per se, but 313 is the track and 314 the heading. The difference may be what you are looking for. In some cases the flight director yaw angle command may be useful, the label is 140.


  [1]: https://sites.google.com/site/thel1011projectwiki/simulator-software/arinc-429-labels