Siri and location services

Can't find an answer anywhere on the net.

If you are using Siri as well as have location services enabled, does that mean Apple are able to essentially work out who you are through putting the two together?

Siri sends your recordings to their servers using a unique identifier. However it also says:

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"If you have Location Services turned on, the location of your device at the time you make a request will also be sent to Apple to …

location location services privacy services siri