Context and question: In the first half of the twentieth century, almost all elevators had no automatic positioning of the floor on which the cab would stop. Some of the older freight elevators were controlled by switches operated by pulling on adjacent ropes. In general, most elevators before WWII were manually controlled by elevator operators using a rheostat connected to the motor. This rheostat (see picture) was enclosed within a cylindrical container about the size and shape of a cake. This was mounted upright or sideways on the cab wall and operated via a projecting handle, which was able to slide around the top half of the cylinder.
 Many earlier built  freight elevators were controlled by what?
Answer: switches operated by pulling on adjacent ropes
Context and question: In Czech, nouns and adjectives are declined into one of seven grammatical cases. Nouns are inflected to indicate their use in a sentence. A nominative–accusative language, Czech marks subject nouns with nominative case and object nouns with accusative case. The genitive case marks possessive nouns and some types of movement. The remaining cases (instrumental, locative, vocative and dative) indicate semantic relationships, such as secondary objects, movement or position (dative case) and accompaniment (instrumental case). An adjective's case agrees with that of the noun it describes. When Czech children learn their language's declension patterns, the cases are referred to by number:
What age do children usually begin understanding grammatical cases?
Answer: unanswerable
Context and question: Mahayana Buddhism encourages everyone to become bodhisattvas and to take the bodhisattva vow, where the practitioner promises to work for the complete enlightenment of all beings by practicing the six pāramitās. According to Mahayana teachings, these perfections are: dāna, śīla, kṣanti, vīrya, dhyāna, and prajñā.
What buddhism encourages everyone to become bodhisattvas?
Answer:
Mahayana