With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The United States Congress lacks 535 voting members.
text_B: The National Museum of Natural History is a museum that covers the natural heritage of Sri Lanka .. Sri Lanka. Sri Lanka. natural heritage. natural heritage. The museum is located closer to the National Museum of Colombo .. Colombo. Colombo. National Museum of Colombo. National Museum of Colombo. It was established on September 23 , 1986 and became only one museum in Sri Lanka that represents natural history and natural heritage .. Sri Lanka. Sri Lanka. natural history. natural history. natural heritage. natural heritage. The National Museum of Natural History exhibits rare and threatened with extinction such as natural heritage of plant and animal species endemic to Sri Lanka , over 5,000 specimens of mammals , jurassic period indigenous fossils and various kinds of geological rocks .. Sri Lanka. Sri Lanka. natural heritage. natural heritage. endemic. endemic. jurassic. jurassic. geological rocks. Rock ( geology )
not_related.