Translate the given Spanish text to English

[Q]: The preparation involves a hydrocyanation reaction.
[A]: La preparacion involucra una reaccion de hidrocianacion.


[Q]: Rheumatoid arthritis is also characterized by joint inflammation.
[A]: La artritis reumatoide tambien se caracteriza por inflamacion articular.


[Q]: Braking systems for railway cars are provided.
[A]:
Se proporcionan sistemas de frenado para vagones ferroviarios.