how can i split the data of input text file

i want to generate a text watermark. for that i am input a text data and need to split the text when preposition(like: is, for, in nd many more) arrived.

Answer 1

[Walter Roberson]

splittext = regexp( originaltext, '\W(is|for|in|on|under)\W', 'split' );

Answer 2

[Pradeep kaur]

this code is not working. Nothing is display