Find specific paragraph in text file using specified conditions

My program currently asks for specific variables, such as temp, rpm etc - all of these variables are saved in a text file with different dates, like: > 12.07 temp 40 grees rpm 200 rpm etc

> 13.07 etc

and it carrys on like that. I'm trying to extract reference the data I input (into the program) with the text file, to find the paragraph with those conditions, but I'm not having much luck. Is there a way of doing that please? Thanks