Groups that emerged from the American psychedelic scene about the same time included Iron Butterfly, MC5, Blue Cheer and Vanilla Fudge. San Francisco band Blue Cheer released a crude and distorted cover of Eddie Cochran's classic "Summertime Blues", from their 1968 debut album Vincebus Eruptum, that outlined much of the later hard rock and heavy metal sound. The same month, Steppenwolf released its self-titled debut album, including "Born to Be Wild", which contained the first lyrical reference to heavy metal and helped popularise the style when it was used in the film Easy Rider (1969). Iron Butterfly's In-A-Gadda-Da-Vida (1968), with its 17-minute-long title track, using organs and with a lengthy drum solo, also prefigured later elements of the sound. 

From outside the United Kingdom and the United States, the Canadian trio Rush released three distinctively hard rock albums in 1974–75 (Rush, Fly by Night and Caress of Steel) before moving toward a more progressive sound with the 1976 album 2112. The Irish band Thin Lizzy, which had formed in the late 1960s, made their most substantial commercial breakthrough in 1976 with the hard rock album Jailbreak and their worldwide hit "The Boys Are Back in Town", which reached number 8 in the UK and number 12 in the US. Their style, consisting of two duelling guitarists often playing leads in harmony, proved itself to be a large influence on later bands. They reached their commercial, and arguably their artistic peak with Black Rose: A Rock Legend (1979). The arrival of Scorpions from Germany marked the geographical expansion of the subgenre. Australian-formed AC/DC, with a stripped back, riff heavy and abrasive style that also appealed to the punk generation, began to gain international attention from 1976, culminating in the release of their multi-platinum albums Let There Be Rock (1977) and Highway to Hell (1979). Also influenced by a punk ethos were heavy metal bands like Motörhead, while Judas Priest abandoned the remaining elements of the blues in their music, further differentiating the hard rock and heavy metal styles and helping to create the New Wave of British Heavy Metal which was pursued by bands like Iron Maiden, Saxon and Venom.
how many Groups that emerged ?
what did blue cheer release ?
of what ?
whats is the name ?
was in in 1970 ?
what is the year ?
what is the ablum name ?
what did he release in the same month ?
who released it ?
what movie was it in ?
in 1970 ?
in what year ?
what was 17 mins long ?
in what year ?
what did it prefigured ?
how many alubums did the Canadian trio Rush put out ?
who gain international attention from 1976 ?
what was released in 1979 ?
who abandoned blues ?
when did lizzy form ?
Four
Iron Butterfly, MC5, Blue Cheer and Vanilla Fudge. San Francisco band Blue Chee
crude and distorted cover
crude and distorted cover
Eddie Cochran's classic
Eddie Cochran's classic
Summertime Blues
Summertime Blues
no
1968
1968
1968
Vincebus Eruptum
Vincebus Eruptum
Born to Be Wild
Born to Be Wild
Steppenwolf
Steppenwolf
Easy Ride
Easy Ride
no
1969
1969
1969
Iron Butterfly's In-A-Gadda-Da-Vida
Iron Butterfly's In-A-Gadda-Da-Vida
1968
1968
later elements of the sound
later elements of the sound
three
three
AC/DC
AC/DC
Highway to Hell
Highway to Hell
Judas Priest
Judas Priest
late 1960s
 late 1960s