With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Douglas Aircraft Company merged with McDonnell Aircraft to form McDonnell Douglas.
text_B: Daiyue -LRB- 岱岳区 ; Pinyin  : Daiyue Qu -RRB- is a district of Tai'an in the Chinese province of Shandong .. Tai'an. Tai'an. Chinese. People's Republic of China. Shandong. Shandong. Taishan has an area of 1750km ² and around 960,000 inhabitants -LRB- 2003 -RRB- .
not_related.