remove extra quote from a string at the beginning and in between by regular expression

Question

we want to remove quote (double or single) at the beginning, end or in between by regular expression.

example

1. "LLC "ZORSOFTKZ"'" -- > expected result "LLC ZORSOFTKZ'"

2. "ADVANCED TRANSFORMATION"" -- > expected result "ADVANCED TRANSFORMATION"

3. ""CENTRUM INFORMATYKI ""ZETO"" SA"" -- > expected result "CENTRUM INFORMATYKI ZETO SA"

4. ""PUBLIC AUTHORITY FOR CONSUMERPROTECTION,(PACP)"" -- > expected result "PUBLIC AUTHORITY FOR CONSUMERPROTECTION,(PACP)"

5. " " -- > expected result ""

thanks Anish

we are looking for the solution using regular expression.