One 1099 rental income for two multi family properties

I received one 1099 from the city for section 8 income.

This was from four apartments.

three of the apartments are in a 3 family property, and one apartment is in a different 3 family property.

so basically one 1099 for partial income from two properties (and 4 apartments).

How do I divide this income between my two properties?

Thank you