import re
s='George is · working here since 2015.'
print( " ".join(re.sub(r'\s*\d+\.|[^\w\s]|_', '', s).split()) )

def clean_text(text):
	return " ".join(re.sub(r'\s*\d+\.|[^\w\s]|_', '', text).split())

print( clean_text(s) )