lemons are a surprisingly effective yet natural cure for darkened teeth.

How would the previous sentence be correctly capitalized?
Answer: Lemons are a surprisingly effective yet natural cure for darkened teeth.
we have aircraft that takes off and lands across north america, between america, caribbean and europe, including reno-tahoe international airport, which is why you can always turn to a get you to where you ma v re.

How would the previous sentence be correctly capitalized?
Answer: We have aircraft that takes off and lands across North America, Between America, Caribbean and Europe, including Reno-Tahoe International Airport, which is why you can always turn to a get you to where you ma v re.
when weather permits, the meals are also served on the terrace overlooking the pool.

How would the previous sentence be correctly capitalized?
Answer: When weather permits, the meals are also served on the terrace overlooking the pool.
this suggests the existence of a natural invariant measure, one that governs the asymptotic distribution of almost all points in the basin of attraction.

How would the previous sentence be correctly capitalized?
Answer: This suggests the existence of a natural invariant measure, one that governs the asymptotic distribution of almost all points in the basin of attraction.