With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: WeChat has instant messaging as a feature.
text_B: WeChat is a Chinese social media -LRB- instant messaging , commerce and payment services -RRB- application developed by Tencent .. instant messaging. instant messaging. Tencent. Tencent. It was first released in 2011 and by 2017 it was one of the largest standalone messaging apps by monthly active users , with over 938 million active users .. monthly active users. monthly active users. However , as of 2017 , WeChat has not been successful in penetrating international markets outside of China .
related.