If Tenant signs as a corporation, limited liability company, or a partnership, or other business entity each person executing this Lease on behalf of Tenant hereby covenants and warrants that Tenant is a duly authorized and existing entity, that Tenant is duly qualified to do business in Massachusetts, that Tenant has full right and authority to enter into this Lease, and that each person signing on behalf of Tenant is duly authorized to do so and that no other signatures are necessary. Upon Landlord's request, Tenant shall provide Landlord with evidence reasonably satisfactory to Landlord confirming the foregoing covenants and warranties.