Premise: Led Zeppelin . Although the group was initially unpopular with critics , they achieved significant commercial success with albums such as Led Zeppelin ( 1969 ) , Led Zeppelin II ( 1969 ) , Led Zeppelin III ( 1970 ) , Led Zeppelin IV ( 1971 ) , Houses of the Holy ( 1973 ) , and Physical Graffiti ( 1975 ) . Led Zeppelin is the eponymous debut studio album by English rock band Led Zeppelin , released on 12 January 1969 in the United States and on 31 March 1969 in the United Kingdom by Atlantic Records .
Hypothesis: 1969 was the year of release for Led Zeppelin's first album.
Label: ENTAILMENT