Kernrechtsfrage
Whether the parties validly agreed to a single lease extension until 31 January 2014.
Extrahierter Entscheid
No valid agreement existed; the tenant's proposal had been refused and was no longer binding when later negotiations continued.
Extrahierte Begründung
The landlord's 21 October 2009 response did not accept the proposed end date and thus did not match the offer; in any event, after seven months the tenant was no longer bound by the offer.