When Aegon the Conqueror took over Westeros, which great house of the Reach became extinct as a result?
House Gardener became extinct during Aegon's Conquest. House Tyrell was then granted rule of The Reach.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: When Aegon the Conqueror took over Westeros, which great house of the Reach became extinct as a result?
### Input: 
### Response: House Gardener became extinct during Aegon's Conquest. House Tyrell was then granted rule of The Reach.