What are “put options written over the non-controlling interests”?

I am looking at the financial statement of the company I am interested in, and in the “other non-current liabilities” they have “written put option liabilities” which are explained as “put options written over the non-controlling interests [in some subsidiaries]”.

I understand put options, but can't get my gead over those special “put options written over NCI”.

Thank you in advance!