QUESTION: Fix punctuation: In the market hall opposite The Grandmasters Palace there are shops on two floors mostly butchers fishmongers and greengrocers It looks inviting
ANS: In the market hall opposite The Grandmaster's Palace there are shops on two floors, mostly butchers, fishmongers and greengrocers. It looks inviting.

QUESTION: Fix punctuation: If a dam is held empty it has the greatest capacity for control of severe floods
ANS: If a dam is held empty it has the greatest capacity for control of severe floods.

QUESTION: Fix punctuation: Leiden Hostel Leiden  budget lodging  Instant World Booking
ANS: Leiden Hostel Leiden - budget lodging | Instant World Booking

QUESTION: Fix punctuation: Hydrogen has to be applied in large excess which guarantees a fast flow over the powder layer
ANS:
Hydrogen has to be applied in large excess, which guarantees a fast flow over the powder layer.