What is the relationship between extra and nine in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Yes, as you said, is six to nine months behind where we are with the FDA right now and our work with the FDA in the U.S. filing, and we've added the extra three months on there just for a little bit of buffer in terms of this current pandemic situation on previously I think we had said, more like six we could still be there.
original_broadcaster