Please capitalize where necessary: and there were shepherds in the same country abiding in the field, and keeping watch by night over their flock.
A: And there were shepherds in the same country abiding in the field, and keeping watch by night over their flock.

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Please capitalize where necessary: when the clothes are produced, we need them to get to us, a transport which sends out tons of co2 and pollutes the environment even more.
A: When the clothes are produced, we need them to get to us, a transport which sends out tons of CO2 and pollutes the environment even more.

Please capitalize where necessary: accelerated idioventricular rhythms occur mainly due to a fluctuation in the heartbeat.
A:
Accelerated idioventricular rhythms occur mainly due to a fluctuation in the heartbeat.