With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Colin Farrell appeared in a movie.
text_B: Back to the Floor is a reality television series broadcast on BBC2 in the late 1990s and early 2000s in which CEOs or top level managers went undercover in their organisations and took a junior / entry level job in their company .. reality television. reality television. BBC2. BBC2. This gave them much to think about during the exercise and learn how their company really works , what the industry is like , and what their employees really think of them .
not_related.