Companies like [entity display="Lending Club" type="organization" subtype="company" active="true" key="lending-club" natural_id="fred/company/91509"]Lending Club[/entity], SoFi, Earnest and CommonBond are tackling the problems of expensive credit card debt, student loan debt, medical debt and mortgages.
Analyze the relationship between 'CommonBond' and 'student loan' within the context of the input sentence.
Options: location of formation, product/material produced, employer, manufacturer