it is now quite common that you can download data as csv files.

How would the previous sentence be correctly capitalized?
Answer: It is now quite common that you can download data as csv files.
the malmö opera hosts international standard opera classics, musicals and contemporary musical dramas.

How would the previous sentence be correctly capitalized?
Answer: The Malmö Opera hosts international standard opera classics, musicals and contemporary musical dramas.
to prove his sincerity zapata required that guajardo's force capture a town held by carranzistas. guajardo's carranzistas then fought and defeated the other carranzistas. guajardo's forces were victorious and to make their conversion more convincing they executed all of the carranzista prisoners they captured.

How would the previous sentence be correctly capitalized?
Answer: To prove his sincerity Zapata required that Guajardo's force capture a town held by Carranzistas. Guajardo's Carranzistas then fought and defeated the other Carranzistas. Guajardo's forces were victorious and to make their conversion more convincing they executed all of the Carranzista prisoners they captured.
all though tommy melles retirement is planned, he leaves with mixed feelings.

How would the previous sentence be correctly capitalized?
Answer: All though Tommy Melles retirement is planned, he leaves with mixed feelings.