question:
Pharmaceutical companies generally employ sales people (often called 'drug reps' or, an older term, 'detail men') to market directly and personally to physicians and other healthcare providers.
Who do drug reps market to?

answer: yes

question:
Counterweights and balances were also used to increase the lifting power of the apparatus.
besides water pressure, what else was used to increase the lifting power?

answer: yes

question:
Southampton Water has the benefit of a double high tide, with two high tide peaks, making the movement of large ships easier.
What island do many people think causes the double high tide in Southampton Water?

answer: no

question:
The Yarlung rulers of Tibet also signed various peace treaties with the Tang, culminating in a treaty in 821 that fixed the borders between Tibet and China.
Who signed multiple peace treaties with the Tang?

answer:
yes