context: I thought.
answer_0: Firstly, they know quite a bit.
answer_1:  they know quite a bit.
answer_2: In sum, they know quite a bit.
answer_3: Indeed, they know quite a bit.
answer_4: Besides, they know quite a bit.
answer_5: Because of this they know quite a bit.
answer_6: Evidently, they know quite a bit.
answer_7: Clearly, they know quite a bit.
answer_8: Obviously, they know quite a bit.
answer_9: Subsequently, they know quite a bit.