What is the fine-grained topic of the following text: Two females — Panda and Maru — and one male — Peace — were gifted to the Honolulu Zoo on Feb. 20, 2014 by the Asa Zoo in Hiroshima, Japan to honor what was then the 55th anniversary of the sister city relationship with the City and County of Honolulu. Only return the topic.
Gift of pandas from Hiroshima's Asa Zoo to Honolulu Zoo to honor sister city relationship anniversary