(?s)applies the following effective flags to the remainder of the pattern: gms s modifier: single line. Allows a dot to match line terminators
^start of line
.*?any Unicode character, repeated any number of times
\(the literal ( (4010 / 508 / 2816)
Reutersthe literal text Reuters (case sensitive) \)the literal ) (4110 / 518 / 2916)
\s*a Unicode whitespace character, repeated any number of times
-the literal - (4510 / 558 / 2D16)
\s*a Unicode whitespace character, repeated any number of times
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