How do I extract the response time from the following log?

[yograjpatel]

INFO -Transaction successful. Time taken to get Response in millis:29; XURA Response Content:\u003c?xml version="1.0" encoding="utf-8"?\u003e

[Rob2520]

| rex field=_raw "\w+\:(?<timeinmillis>\d+)\;"

[Vijeta · Accepted solution]

@yograjpatel Try this

|rex field=_raw "\W+millis:(?<response_time>\d+);"

[yograjpatel]

tried the below:
rex field=_raw "Time taken to get Response in millis\"\s:\s\"(?[^\"]+)"

not able to get the output