Answer:
I am a rock group with four members all of whom died in plane crashes. Who am I?
I only exist when you are here. Where you never were I can never be.
My first is a heir; My second's a snare; my whole is the offspring of fancy; which I sent out of play upon Valentine's day As a token of love to my Nancy.
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
What has words but never speaks?
When is it bad luck to see a black cat?