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.
<START_INST>When Aegon the Conqueror took over Westeros, which great house of the Reach became extinct as a result?<END_INST><START_CTX><END_CTX><START_A>House Gardener became extinct during Aegon's Conquest. House Tyrell was then granted rule of The Reach.<END_A>