With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mark Zuckerberg co-founded Myspace.
text_B: Liverpool has a lengthy tradition of music both classical and pop .. Liverpool. Liverpool. classical. classical music. pop. popular music. It is well known for The Beatles -LRB- who recorded 17 UK and 20 US number-one singles -RRB- .. The Beatles. The Beatles. UK Singles Chart. Billboard Hot 100. Its pop and rock music scene has also been important in the development of a number of other bands and artists since the 1950s .. pop. popular music
not_related.