Sheehan, whose 24-year-old son, Casey, died last year in Iraq, started her antiwar demonstration along the roadside in Crawford, Texas, on Aug. 6, demanding to meet with the president.
Sheehan is 25 years old
Sheehan can't be 25 if her son is 24. 
( z1 person :name ( z2 name :op "Sheehan" ) :age ( z3 temporal-quantity :quant 25 :unit ( z4 year ) ) )