context: After gaining experience as an assistant in a pharmacy, Accum studied science and medicine at the Great Windmill Street School of Anatomy in London. He met with the surgeon Anthony Carlyle (1768-1842) and the London chemist William Nicholson (1753-1815). In the Nicholson’s Journal, Accum published his first article in 1798. [5] On May 10, 1798, Accum married Mary Anne Simpson (March 7, 1777 - March 1, 1816, London). He anglicized his name to Frederick. Frederick and Mary had eight children, but only two of them survived into adulthood.
question: How many children did Friedrich Christian Accum have?
answers.text: eight