With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Incredible Hulk is the second film in the Marvel superhero series.
text_B: World Water Day is an annual event celebrated on 22 March .. Water. Water. The day focuses attention on the importance of universal access to clean water , sanitation and hygiene -LRB- WASH -RRB- facilities in developing countries .. WASH. WASH. developing countries. developing countries. water. water. The day also focuses on advocating for the sustainable management of freshwater resources .. sustainable management. sustainable management. World Water Day is supported by stakeholders across the globe .. Water. Water. Many organizations promote clean and. water for people and sustainable aquatic habitats .. water. water. Events such as theatrical and musical celebrations , educational events , and campaigns to raise money for access to clean and affordable water are held worldwide on or close to 22 March .. water. water. UN-Water selects a theme for each year .. Water. Water. UN-Water. UN-Water. Previous themes included  : ` Why waste water ? '. water. water. -LRB- a play on words with ` Why wastewater ? ' -RRB-. wastewater. wastewater. in 2017 , ` Water and Jobs ' in 2016 , and ` Water and Sustainable Development ' in 2015 .. Water. Water. The first International World Water Day , designated by the United Nations , was commemorated in 1993 .. Water. Water
not_related.