Based on the clue 'by career homers 1 barry bonds 2 hank aaron 3 babe...', what is the answer?

Based on the clue 'by atomic number 1 hydrogen 2 helium 3 lithium 4 t...', what is the answer? Based on the clue 'by atomic number this noble gas number 10 is the f...', what is the answer? Based on the clue 'by barbara tuchman the guns of', what is the answer? Based on the clue 'by birth richard nixon ronald reagan john f kenned...', what is the answer? Based on the clue 'by careers end wayne gretzky was the great one ear...', what is the answer? Based on the clue 'by carrying plague this tiny insect killed 13 of t...', what is the answer? Based on the clue 'by clinging to the belly of a ram this mythologica...', what is the answer? What is associated with: by colombian banana plantation workers in 1928?