50488
The last person to be shot and killed while trying to cross the border was Chris Gueffroy on 6 February 1989 , while the final person to die in an escape attempt was Winfried Freudenberg who was killed when his homemade natural gas-filled balloon crashed on 8 March 1989 .
 Chris Gueffroy, Winfried Freudenberg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Chris Gueffroy, Winfried Freudenberg