personally, I think you need to pay attention in english at school.
Say the sentence aloud and note whether you naturally pause after the word 'field'. If you do, you need a comma. If you don't, you don't need a comma. Personally I would not put a comma (or, 'Personally, I would not put a comma'). If it's your sentence it's your choice (or, 'If it's your sentence, it's your choice').
An example: "You never seize to amaze me."
intact is a dumb word
in this situation
you would put it after
The World in a Sentence would be - A Vast expression of nature mistreated.
you just did dork
you just said the answer
One example would be "How do you put the word paperweight in a sentence?". Another example would be "He knocked the paperweight off his desk.".
Example sentence - When I pet my cat, he purrs contently.
I put the word wool in a ten word sentence.
see How do you put the word countries in a sentence?