eg, July21 1969 1st M on M (NA)=1st Man on Moon (Neil Armstrong)
Feb 28th 1943 1st DB of B=1st
Dec 17th 1903 1st H T A F (byWB)=1st
June 8th 1979 1st D E to EP = 1st
June1st 1951 1st P B P D=1st
May 21st 1927 1st S T F (by VF)=1st
March 2nd 1910 1st O C of A (byVF)=1st