With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: NASA is responsible for the Skylab space station.
text_B: Chiel Mathijs Warners -LRB- born 2 April 1978 in Harderwijk , Gelderland -RRB- is a former Dutch decathlete .. Harderwijk. Harderwijk. Gelderland. Gelderland. Dutch. Netherlands. decathlete. decathlete
not_related.