Just to widen the options here ...
In this example you could also use the LSPLIT or RSPLIT functions along with the Chr(34) representation of " .
RSPLIT(Myfield, 2, CHR(34), 2)
(rsplit counts fields form the right heading left ...)
LSPLIT(Myfield, 2, CHR(34), 1)
(lsplit counts fields from the left heading right ...)
For more information see the Functions Reference in the system help file.
There are often several ways of approaching the solution. Sometimes one way will be more useful or appropriate to a particular set of circumstances than another, usually either for convenience or flexibility of how it can be applied.