With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ivan Lendl is a baseball player.
text_B: Captain Matthew Gideon is a character in the fictional universe of the television series Babylon 5 , played by Gary Cole .. Babylon 5. Babylon 5. Gary Cole. Gary Cole. Gideon was the lead character in the B5 spin-off show Crusade , which ran for 13 episodes in 1999 .. Crusade. Crusade ( TV series )
not_related.