With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Iain Glen is an actor.
text_B: `` Top of the World '' is a song by American recording artist Bridgit Mendler , taken from Mendler 's debut studio album , Hello My Name Is ... -LRB- 2012 -RRB- .. Bridgit Mendler. Bridgit Mendler. It was composed by Mendler , Emanuel `` Eman '' Kiriakou , Jai Marlon , Laura Raia , David Ryan and Freddy Wexler .. Freddy Wexler. Freddy Wexler. The song was released as a promotional single to Radio Disney on October 12 , 2012 .. Radio Disney. Radio Disney. On August 4 , 2013 the song was announced as the official third single by some radio stations , but that was never confirmed .. The song received acclaim from music critics , who praised Mendler 's vocals and the song 's pop influence .. pop. Pop music
not_related.