Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

Early life Picasso was baptized Pablo Diego José Francisco de Paula Juan Nepomuceno María de los Remedios Crispiniano de la Santísima Trinidad, a series of names honouring various saints and relatives.
Picasso was baptized and took on the name Pablo Diego José Francisco de Paula Juan Nepomuceno María de los Remedios Crispiniano de la Santísima Trinidad. This long name is a series of names that honor saints and relatives.

He received the punishment of being forced to shoot an apple off the head of his son, Walter, or else both would be executed.
His punishment was having to shoot an apple off the head of his son, Walter. If he did not, both would be executed.

The Secretary of State for Culture, Media and Sport is a United Kingdom cabinet position with responsibility for the Department for Culture, Media and Sport.

The Secretary of State for Culture is a position in UK cabinet. It has responsibility for the Department for Culture, Media and Sport.

