With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Syd Barrett sang.
text_B: Robert Hammond aka Bob Hammond is an author , film producer , public speaker and occasional actor .. He is the author of Ready When You Are  : Cecil B. DeMille 's Ten Commandments for Success , Life After Debt and Repair Your Own Credit .
not_related.