The 3 groups collected a total of 94 bottles, the second group collected 29 bottles, the first group collected 34 bottles, how many bottles were collected in the third group?
3个组共收集94个瓶子，二组收集29个，一组收集34个，三组收集几个？
<gadget id="calculator">94 - 29 - 34</gadget>
<output>31</output>

<result>31</result>