The next paragraph is a specific declaration by the seller that he intends his sale of the premises described in the contract to include, and will convey also, whatever rights or title he may have to the center line of any adjoining street. The principal value of such right or title is that should the municipality ever take title to the street an award would be payable to the owner. The award might be considerable and the purchaser should always see that the contract contains this agreement. In addition further to accomplish this purpose the same paragraph further assigns and obligates the seller to assign to the purchaser any award already made.