the first thing i bought was one of those toy trains with a spring you wind up, which would make it run for about a minute on a track in a circle. i had wanted that for years, and now i finally got it. after putting it together, and watched it run a short while, i realized it was too late, i had grown too old, brought it back to the store and got a refund, but it taught me a valuable lesson: don't wait too long when you want to do something, do it now!

How would the previous sentence be correctly capitalized?
Answer: The first thing I bought was one of those toy trains with a spring you wind up, which would make it run for about a minute on a track in a circle. I had wanted that for years, and now I finally got it. After putting it together, and watched it run a short while, I realized it was too late, I had grown too old, brought it back to the store and got a refund, but it taught me a valuable lesson: don't wait too long when you want to do something, do it now!
hardy considered it unimportant but it has proved of major importance in blood group distribution.

How would the previous sentence be correctly capitalized?
Answer: Hardy considered it unimportant but it has proved of major importance in blood group distribution.
description: russet-crowned warbler in a impatiens plant.

How would the previous sentence be correctly capitalized?
Answer: Description: Russet-crowned Warbler in a Impatiens plant.
the hotel lies 12 km from congonhas airport and 2 km from the alpha theatre. the hotel features a staffed business center and a self service business center, which features a fax machine.

How would the previous sentence be correctly capitalized?
Answer: The hotel lies 12 km from Congonhas Airport and 2 km from the Alpha Theatre. The hotel features a staffed business center and a self service business center, which features a fax machine.