Please answer this: Extract the answer to the question from the following context. Question: What area can be found at the mouth of a river? Context: Zhejiang benefited less from central government investment than some other provinces due to its lack of natural resources, a location vulnerable to potential flooding from the sea, and an economic base at the national average. Zhejiang, however, has been an epicenter of capitalist development in China, and has led the nation in the development of a market economy and private enterprises. Northeast Zhejiang, as part of the Yangtze Delta, is flat, more developed, and industrial.
++++++++
Answer: Delta


Please answer this: Extract the answer to the question from the following context. Question: What is the shorter form for Tuberculosis? Context: One-third of the world's population is thought to be infected with TB. New infections occur in about 1% of the population each year. In 2014, there were 9.6 million cases of active TB which resulted in 1.5 million deaths. More than 95% of deaths occurred in developing countries. The number of new cases each year has decreased since 2000. About 80% of people in many Asian and African countries test positive while 5–10% of people in the United States population tests positive by the tuberculin test. Tuberculosis has been present in humans since ancient times.
++++++++
Answer: TB


Please answer this: Extract the answer to the question from the following context. Question: What is a form of interaction? Context: Currently, the Regular Force component of the Army consists of three field-ready brigade groups: 1 Canadian Mechanized Brigade Group, at CFB Edmonton and CFB Shilo; 2 Canadian Mechanized Brigade Group, at CFB Petawawa and CFB Gagetown; and 5 Canadian Mechanized Brigade Group, at CFB Valcartier and Quebec City. Each contains one regiment each of artillery, armour, and combat engineers, three battalions of infantry (all scaled in the British fashion), one battalion for logistics, a squadron for headquarters/signals, and several smaller support organizations. A tactical helicopter squadron and a field ambulance are co-located with each brigade, but do not form part of the brigade's command structure.
++++++++
Answer:
signals