(?:(<br>){2})(?'Gallery'.*)((<br>){1})  - sets a group just for gallery - replace with ${Gallery}


(?:(<I>){1})(?'Title'.*?)((</I>){1})   - sets a group for title


(?'Title'<p>.*(</i>),?)\s(?'Venue'(\(gs\).*\(ge\)\sMelbourne\.))\s*(?'Artist' [A-Z]{2,}(.*))\r\n - to separate groups in final step.