With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Water occurs in nature as snow and dew.
text_B: Quentin Cooper -LRB- born 1961 , Grimsby -RRB- is a science journalist and facilitator , best known as the presenter of BBC Radio 4 's Material World .. Grimsby. Grimsby. Material World. Material World ( radio programme ). BBC Radio 4. BBC Radio 4. He speaks at science festivals and lectures , and works regularly with science and educational organisations such as the Royal Society and the British Council .. Royal Society. Royal Society. British Council. British Council
not_related.