Hair of the Dog is the sixth studio album by the Scottish hard rock band Nazareth, released in 1975. The album was recorded at Escape Studios, Kent, with additional recording and mixing at AIR Studios, London, and is the band's biggest selling album, having sold two million copies worldwide.
Nazareth had five albums in 1975 and prior.
It said it was the sixth album and released in 1975, that means up to 1975, there were five albums. Computer probably didn't get syntax.