(b) shall, to the extent the warranty is breached or cannot be cured
by reason of a strike or other labor dispute which is not caused
primarily by the individual landlord or lessor and such damages are
attributable to such strike, exclude recovery to such extent, except to
the extent of the net savings, if any, to the landlord or lessor by
reason of such strike or labor dispute allocable to the tenant's
premises, provided, however, that the landlord or lesser has made a good
faith attempt, where practicable, to cure the breach.