With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Coldplay released an EP with Bon Jovi.
text_B: An edge-localized mode -LRB- `` ELM '' -RRB- is a disruptive instability occurring in the edge region of a tokamak plasma due to the quasi-periodic relaxation of a transport barrier previously formed during an L -- > H transition -LRB- ie in H-mode -RRB- .. instability. instability. tokamak. tokamak. plasma. plasma ( physics ). H-mode. high-confinement mode. This phenomenon was first observed in the ASDEX tokamak in 1981 .. tokamak. tokamak. ASDEX tokamak. ASDEX Upgrade
not_related.