What is associated with: a split in the plantagenet family led to this series of civil wars in the 1400s?

Based on the clue 'a spirometer is used to measure the air capacity o...', what is the answer? Based on the clue 'a spirometer measures the capacity of these organs', what is the answer? Based on the clue 'a splendid brilliantly shining person against whom...', what is the answer? Based on the clue 'a splinter group of ragdoll cat breeders called th...', what is the answer? Based on the clue 'a spoiled child hopefully you dont have a pack of ...', what is the answer? Based on the clue 'a spokane library named for this white christmas s...', what is the answer? What is referred to by 'a spoken magic spell'? Based on the clue 'a sponge cake without egg yolks or butter its fat ...', what is the answer?