Question: International Animal Rescue, also known as IAR, is an animal welfare non-profit organization based in the United Kingdom, it specializes in comprehensive sterilization and vaccination programs, and which is the removal of an animal's reproductive organ, either all of it or a considerably large part, for stray dogs and cats, particularly in developing countries?
Sentence (from "Street dogs in Sofia"): It was estimated that that there were in 2013 about 6,635 stray dogs in the city, a large decrease from previous years.
Relevant evidence: No