Inserting Line Breaks With Formula

I have a column with hundreds of rows.

In that column, each row has an article. The article contains many paragraphs.

I want to insert a line break where each sentence ends and 2 line breaks where each paragraph ends.

I need to do this so I can import the whole spreadsheet into my site where the article will be displayed properly as per the formatting done within excel.

I know CHAR(10) adds a line break, but how do I do this with multiple paragraphs?
The reason why I think its a problem is because I know you have to have speech marks around the rest of the text before and after each line break.

Furthermore, you need to start the article with a = sign.

Have I understood it wrong or is there a better way?

Thanks,

JH

So, if I type in:

The Quick Brown Fox Jumps &CHAR(10)& Over The Lazy Dog

Will it work without any speech marks or = sign at the beginning?

I've tried it this way and it doesnt work.

My cell is set to wrap.

you could probably do all that in word!

I need to do this in a formula coz I have hundreds of rows and I cant go through each article on each row sorting out the line breaks.

Is there a simpler way?

you could try find /replace
find .
replace
.alt+010

A paragraph could be designated as at least 2 spaces after a full stop while a sentence would be just one space. or even a hard return.

I'm using a mac. What does alt 010 do?

inserts char 10

Or if you want carriage returns at the paragraph breaks...

=SUBSTITUTE(SUBSTITUTE(A1,". ","."&CHAR(10)&CHAR(10)),". ","."&CHAR(10))