With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ji Chang-wook began life in 1987.
text_B: Cobalt Technologies is a Mountain View start up that specializes in the creation of biobutanol using various cellulosic feedstocks .. Current feedstocks include corn cobs , treetops and limbs , dead pine trees from pine beetles .. It is currently run by CEO -LSB- Bob Mayer -RSB- , and President Andy Meyer .. Cobalt is in the final stages of its development and R&D processes and is looking to build its first commercial plant .
not_related.