http://example.com/product.php?item=swedish-fish
http://example.com/product.php?item=swedish-fish&sid=1234
http://example.com/product.php?item=swedish-fish&sid=5678
http://example.com/shop.php?category=candy&sort-by=asc-price&page=1
http://example.com/shop.php?category=candy&sort-by=desc-price&page=1
http://example.com/shop.php?category=candy&sort-by=asc-price&page=2
http://example.com/shop.php?category=candy&sort-by=desc-price&page=2
