Tenant will keep the Premises free from any mechanics', materialmen's, designers' or other liens arising out of any work performed, materials furnished or obligations incurred by or for Tenant or any person or entity claiming by, through or under Tenant. If any such liens are filed, Tenant at its option may contest the validity of any lien or claim of lien, provided that within sixty (60) days after such filing (or sooner if such lien is impeding any sale or financing of the Premises), Tenant shall release the same of record or provide Landlord with a bond or other security satisfactory to Landlord protecting Landlord and the Premises against such liens.