import re
ss = ["Elector's Name: Surpam Badurubai Elector's Name: Madavimaru Elector's Name: Madavitannubai",
"Elector's Name: GEDAM KARNU Elector's Name: GEDAM BHEEM BAI Elector's Name: Surpam Rajeshwar Rav"]
for s in ss:
print(re.findall(r"Elector's Name:\s*(.*?)(?=\s*Elector's Name:|$)", s))
aW1wb3J0IHJlCnNzID0gWyJFbGVjdG9yJ3MgTmFtZTogU3VycGFtIEJhZHVydWJhaSBFbGVjdG9yJ3MgTmFtZTogTWFkYXZpbWFydSBFbGVjdG9yJ3MgTmFtZTogTWFkYXZpdGFubnViYWkiLAogICAiRWxlY3RvcidzIE5hbWU6IEdFREFNIEtBUk5VIEVsZWN0b3IncyBOYW1lOiBHRURBTSBCSEVFTSBCQUkgRWxlY3RvcidzIE5hbWU6IFN1cnBhbSBSYWplc2h3YXIgUmF2Il0KZm9yIHMgaW4gc3M6CglwcmludChyZS5maW5kYWxsKHIiRWxlY3RvcidzIE5hbWU6XHMqKC4qPykoPz1ccypFbGVjdG9yJ3MgTmFtZTp8JCkiLCBzKSk=