this marriage caused problems for sofia and, throughout its fifteen years, it was a source of intermittent sorrow, exasperation and tension and her concentration was broken by her frequent quarrels and misunderstandings with her husband .

How would the previous sentence be correctly capitalized?
Answer: This marriage caused problems for Sofia and, throughout its fifteen years, it was a source of intermittent sorrow, exasperation and tension and her concentration was broken by her frequent quarrels and misunderstandings with her husband .
their opinions were the ones to fallow and nothing else. danny is a caring guy who loves his family and wants the best for them and helps as much as he can, but he's racist side wants to go out partying and listen to white power music.

How would the previous sentence be correctly capitalized?
Answer: Their opinions were the ones to fallow and nothing else. Danny is a caring guy who loves his family and wants the best for them and helps as much as he can, but he's racist side wants to go out partying and listen to white power music.
a screenshot posted by pc world's brad chacos on twitter highlights the new get windows 10 prompt.

How would the previous sentence be correctly capitalized?
Answer: A screenshot posted by PC World's Brad Chacos on Twitter highlights the new Get Windows 10 prompt.
there is a slight reduction of 2-6 per cent in primary energy, resources, and in almost all impact categories corresponding to the energy consumption in ironing.

How would the previous sentence be correctly capitalized?
Answer: There is a slight reduction of 2-6 per cent in primary energy, resources, and in almost all impact categories corresponding to the energy consumption in ironing.