original: though not popular , herring roe is sold within many british supermarkets .
simplifications: herring roe is sold within many british supermarkets . though not popular , herring roe is sold at many british supermarkets . though not popular , herring eggs are sold within many british grocery stores . though not popular , herring roe is sold within many british supermarkets . though not popular , herring is sold by many british supermarkets . though not popular , herring roe is sold within many british supermarkets . though not popular , herring roe is sold in many british supermarkets . herring roe is sold within many british supermarkets .