Mapper Attachment in creating relationship

I am using mapper attachment plugin and creating different data with different ids. How can I create mapping relationship between data so that I am able to make relationship between data.

For example, I have input data with content include "Kobe Bryant" in id=1 and with content include "Mamba" in id=2. How can I make them two related so when I search Kobe Bryant, the term "Mamba" will also appear?

What would the relationship based on?

Like linking them that they are the same person

I don't think you can.
May be Graph API could do this though.

Or running an aggregation on author field with top hits then???