question: How many days after the American and Soviet forces met at the Elbe river was the Reichstag captured?
#1 return the  American and  Soviet forces met at the   Elbe river 
#2 return Reichstag captured 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return difference of #4 and  #3 in  days