question: mail: click the "block user" button while reading their email message
Capitalize this past sentence correctly.
A: Mail: click the "Block User" button while reading their email message

question: this is a piece of the emperor.
Capitalize this past sentence correctly.
A: This is a piece of the emperor.

question: this plastic is found more and more frequently in the advertising industry where it used for decorative and labelling foil.
Capitalize this past sentence correctly.
A: This plastic is found more and more frequently in the advertising industry where it used for decorative and labelling foil.