Remove characters before :

[qlikwiz123]

I have Column - Data that has values in the format below

10/25/2015 : Agent1: This is the right value

05/11/2017 : Agent 56: Please change the report

I need to remove everything before the second ':' and only show the text in my output.

This is the right value

Please change the report

How do I do this in the expression or Script? I tried =Mid(Data, Index(Data, ': ')+2) but this only removes text before the first ':'

[qlikwiz123]

This is more dynamic since I don't have to mention the string 'Agent' as this is not constant. Thank you