Identify Yahoo's "limit exceeded" message when limit reached

Yahoo has a limit of 5000 queries per 24 hour period. At this point it will return the following message, which should be identified:

<Error xmlns="urn:yahoo:api" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://api.yahoo.com/Api/V1/error.xsd">
 The following errors were detected:
 <Message>limit exceeded</Message>
</Error>

Please see the Yahoo Rate Limiting page for more details.