With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joe Biden became President in 2009.
text_B: The Kharol are a Hindu caste found in the state of Rajasthan in India .. Hindu. Hindu. caste. caste. Rajasthan. Rajasthan. India. India. Kharol are classified as an Other Backward Class -LRB- OBC -RRB- in Rajasthan .. Rajasthan. Rajasthan. Other Backward Class. Other Backward Class
not_related.