Serein (/srin/; (s) in French) refers to rain falling from a cloudless sky. This sort of rain is said to take on the form of a fine, light drizzle, typically after dusk. The name derives from French serein, meaning ''serene'', or ''clear'' (as in unclouded). An alternative etymology is from Old French serain, evening.

OPTIONS:
- no
- yes

can it rain without clouds in the sky?

A: yes

The University of Pittsburgh (commonly referred to as Pitt) is a state-related research university located in Pittsburgh, Pennsylvania. In 1787 after the American Revolutionary War, it was founded on the edge of the American frontier as the Pittsburgh Academy. It developed and was renamed as Western University of Pennsylvania by a change to its charter in 1819. After surviving two devastating fires and various relocations within the area, the school moved to its current location in the Oakland neighborhood of the city; it was renamed as the University of Pittsburgh in 1908. For most of its history, Pitt was a private institution, until 1966 when it became part of the Commonwealth System of Higher Education.

OPTIONS:
- no
- yes

is the university of pittsburgh a state school?

A: yes

An engine or motor is a machine designed to convert one form of energy into mechanical energy. Heat engines burn a fuel to create heat which is then used to do work. Electric motors convert electrical energy into mechanical motion; pneumatic motors use compressed air; and clockwork motors in wind-up toys use elastic energy. In biological systems, molecular motors, like myosins in muscles, use chemical energy to create forces and eventually motion.

OPTIONS:
- no
- yes

is the engine the same as the motor?

A: yes

Four descents have been achieved. The first was the manned descent by Swiss-designed, Italian-built, United States Navy-owned bathyscaphe Trieste which reached the bottom at 1:06 pm on 23 January 1960, with Don Walsh and Jacques Piccard on board. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 11,521 m (37,799 ft), but this was later revised to 10,916 m (35,814 ft). The depth was estimated from a conversion of pressure measured and calculations based on the water density from sea surface to seabed.

OPTIONS:
- no
- yes

is it possible to go to the bottom of marianas trench?

A:
yes