Can anyone explain multi-frame CANbus resonses?

I'm trying to understand multi-frame CAN responses. I understand that a length of 0x10 indicates that there is a multi frame response, but I don't know what the format of the other frames should look like. For example

If I send: 07E221C3
I get back: 07EA102761C3400111D00000

OK... but what is the key field I need to look for to piece grab the other response frames.​

I see multi-frame messaging mentioned here, and I looked through the Bosh spec on CANa and CANb and see no mention of multi-frame messaging or response fragmentation.

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