A = half the number of letters in the 1st word
B = the number of letters in the 4th word
C = the 2nd number on the plaque
D = the number of letters in the 15th word (Ignore numbers and symbols)
E = reduce the sum of the numbers in the dates to one digit
F - the 5th word on the bottom line
The cache can be found at N52 24.ABC E000.45.DEF