Conversation so far:
What is Home Plate during the Spirit rover mission?
An area from the peak of Husband Hill where Spirit spotted a striking formation, which was dubbed Home Plate
When did the global dust storm occur during the Spirit rover mission?
Towards the end of June 2007, Spirit saw a series of dust storms began clouding the Martian atmosphere with dust.
How did the dust storms affect the Spirit rover?
Both Spirit and Opportunity were facing the real possibility of system failure due to lack of energy.
Did either Spirit or Opportunity rovers end up experiencing a system failure during the dust storm?
No, Spirit and Opportunity were kept in hibernation in order to wait out the remainder of the storm.

Question: What did they find?
Self-contained rewrite: What did the Spirit and Opportunity rovers find during their mission?