With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Whiskey Tango Foxtrot was written by Robert Carlock.
text_B: In atomic , molecular , and optical physics , above threshold ionization -LRB- ATI -RRB- , is a multi-photon effect where an atom is ionized with more than the energetically required number of photons .. multi-photon. Photoelectrochemical processes#Multi-photon ionization. photon. photon. It was first observed in 1979 .
not_related.