With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Asteroid Day is an event.
text_B: Asteroid Day -LRB- also known as International Asteroid Day -RRB- is an annual global event that aims to raise awareness about asteroids and what can be done to protect the Earth , its families , communities , and future generations .. asteroids. asteroids. Earth. Earth. Asteroid Day is held on the anniversary of the June 30 , 1908 Siberian Tunguska event , the most harmful known asteroid-related event on Earth in recent history .. Earth. Earth. Tunguska event. Tunguska event. The United Nations has proclaimed that Asteroid Day will be observed globally on June 30 every year in its resolution .. United Nations. United Nations. It was co-founded by filmmaker Grigorij Richters , B612 Foundation COO Danica Remy , Apollo 9 astronaut Rusty Schweickart and Brian May , Queen guitarist and astrophysicist .. Grigorij Richters. Grigorij Richters. B612 Foundation. B612 Foundation. Apollo 9. Apollo 9. Rusty Schweickart. Rusty Schweickart. Brian May. Brian May. Queen. Queen ( band ). Over 200 astronauts , scientists , technologists and artists , including Richard Dawkins , Bill Nye , Peter Gabriel , Jim Lovell , Apollo 11 Astronaut Michael Collins , Alexei Leonov , Bill Anders , Kip Thorne , Lord Martin Rees , Chris Hadfield , Rusty Schweickart and Brian Cox co-signed the Asteroid Day Declaration .. Rusty Schweickart. Rusty Schweickart. Richard Dawkins. Richard Dawkins. Bill Nye. Bill Nye. Peter Gabriel. Peter Gabriel. Jim Lovell. Jim Lovell. Alexei Leonov. Alexei Leonov. Bill Anders. Bill Anders. Kip Thorne. Kip Thorne. Martin Rees. Martin Rees. Chris Hadfield. Chris Hadfield. Brian Cox. Brian Cox ( physicist ). Asteroid Day was officially launched on December 3 , 2014 .
related.