(?s)applies the following effective flags to the remainder of the pattern: gms s modifier: single line. Allows a dot to match line terminators
Person Handling Requestthe literal text Person Handling Request (case sensitive) .*?any character, repeated any number of times
First Namethe literal text First Name (case sensitive) \*the literal * (4210 / 528 / 2A16)
\s*any whitespace character, repeated any number of times
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match
(?-s)applies the following effective flags to the remainder of the pattern: gm s modifier: -single line. A dot does not match line terminators
.+any character (except for line terminators), repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string