Formating headers in Excel to upload contacts

I saw a template of an example to format Excel headers to upload contacts - however, I am trying to upload property owners as a single contact and it does not address adding a second first name and last name and second email and second phone number to capture both the husband and wife, or two different unmarried owners of a property. How is this done...? It would be silly to have to make a completely separate contact person for 123 main street, instead of having both spouses in a contact record! Thanks!