Missing 3 examples for Person to Campaign, Opportunities and Marketing List

Issue in ./help/introduction.md

Need to add 3 specific examples of these MAJOR use cases to provide confidence that the 3 bridge tables work-
i) Person to Opportunities
ii) Person to Campaign
iii) Person to marketing List.

The path is browsable in Segment UI but segments DONT Evaluate.
I have raised a PLATIR for the same but it is necessary to add working examples in this guide page.
https://jira.corp.adobe.com/browse/PLATIR-23156

I have also came across this particular demo by Scott Trafton which I dont think is relevant.
https://xd.adobe.com/view/c0c127aa-7659-4a9b-8aea-d36770e6ebfc-9592/screen/c24b13ff-9b54-4e25-87a1-c975459034ed?fullscreen
Reason- The demo is NOT IN LINE with the way relationships are set by the auto-gen postman utility.
Only Person to Accounts is via 'person components' object array but in the demo above, the remaining three also are shown to be via 'person components'.
Current schema setup for Opportunities, Campaign and Lists is as shown below-

Open help/introduction.md and compare its existing examples with the current Opportunities, Campaign, and marketing List relationship setup and the auto-generated Postman utility. Review PLATIR-23156 and the referenced demo for context. Done means the guide contains three working Person relationship examples and demonstrates that the corresponding segments evaluate.

Written by the indexing model from the issue text.