What is the fine-grained topic of the following text: Pursuant to the Public Invitation for participation in the public bidding for purchase of real estate of Socially-owned enterprise Industry of chains, transport and warehouse systems "Filip Kljajić", in restructuring, from Kragujevac, 49 Dragoslava Srejovića St, that is, the property whole – Small Chain Plant as seen, sale code 260707-R-1874, announced on 27.03.2007, 23.04.2007, 28.05.2007 and 28.06.2007 in the daily newspaper "Politika". Only return the topic.
Public bidding for purchase of real estate of a socially-owned enterprise.