todays QoTD

CR7_ManUtd
Tue, 05 May 2009 17:06:55 +0000

''Whether the Sumerians were the first people to develop writing is uncertain, but theirs is the oldest known writing system ‘’

Normally ,it should sounds like this

‘’''Whether the Sumerians were the first people to develop writing is uncertain, but the oldest known writing system is theirs ‘’

However,it is gramatically correct to put ‘‘theirs’’ after ‘‘but’’