sentences:  This ranks her fourth among German hammer throwers, behind Betty Heidler, Susanne Keil and Kathrin Klaas.She is a one-time national champion in the women's hammer throw (2004).Annihilation radiation
  
  Annihilation radiation is a term used in Gamma spectroscopy for the photon radiation produced when a particle and its antiparticle collide and annihilate.