question: onsdag den 20. december 2017
Capitalize this past sentence correctly.
A: onsdag den 20. December 2017

question: stefan horst discovered a vulnerability in the drupal database abstraction api, which may result in sql injection.
Capitalize this past sentence correctly.
A: Stefan Horst discovered a vulnerability in the Drupal database abstraction API, which may result in SQL injection.

question: as explained above, the best place to buy this incredible pill is through online retailers.
Capitalize this past sentence correctly.
A: As explained above, the best place to buy this incredible pill is through online retailers.