First of all I am not very sure if my question belongs to this site. It can get downvoted or asked for deletion. My apologies beforehand if this is the case.
I often encountered the necessity to write a lemma, a theorem or a problem (which is composed by merely words) in maths but I couldn't find a way of how to do it with Roman typeface. As it is customary use in formulas.
I'm aware that to write a long set of words can be done by just typing it in the box Stack provides as I'm doing it now by writing this question. But this method does not help too much to address a clear difference between which part of the problem is the "mathematical problem itself" and the "problem within the problem".
Although I could use cursive, bold and even quote or pre formatted text as given in the options none of this feels right as it does not match with what is used in mathematical context. Therefore, is there any alternative for avoiding to use recursively:
\textrm{}
or more properly,
\mathrm{}
As each time I want to write a long sentence I end up splitting the latter and calling the instruction over and over again.
\mathrm{This is an example text. This is an example text}
\mathrm{This is an example text. This is an example text}
Therefore, How to write a paragraph using Roman typeface, is there a tutorial for this?.