sentences:  Van der Kemp was released on 9 December 1787 for a ransom of 45,000 guilder and emigrated to the U.S.A.
  
  Adriaan was the son of an army officer, his mother was related to Willem Jacob 's Gravesande, a scientist.He grew up in Zutphen and Zwolle, but in 1766 the family moved to 's-Hertogenbosch.Adriaan studied at the local grammar school and moved to the University of Groningen to study Oriental languages and botany under Petrus Camper.