?repeats the group contents below at most once:
\sany whitespace character
\(the literal ( (4010 / 508 / 2816)
IVthe literal text IV (case sensitive) V?optionally matches the literal V (8610 / 1268 / 5616) (case sensitive)
I{0,3}the literal I (7310 / 1118 / 4916) (case sensitive), repeated between 0 and 3 times
\)the literal ) (4110 / 518 / 2916)