| str_find | R Documentation | 
wrapper function for locate a string based on regex leading to and after it
str_find(str, start, end, replacement, return_loc = FALSE)
| str | a string to search from | 
| start | a regex string that lead to the string of interest | 
| end | a regex string that is after the string of interest | 
| replacement | a string to replace the located string, optional. | 
_loc a logical, if TRUE then return character start/end location instead of the string itself
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