Instruct: Given a premise, retrieve a hypothesis that is entailed by the premise.
Query: Excalibur is the ninth studio album by Grave Digger and is the final album of the "Middle Ages Trilogy". It tells about the story of King Arthur and the knights of the round table. The line-up for the backing vocals to this album included Piet Sielck, Hansi Kürsch, Hacky Hackmann + Boltendahl.
Excalibur was meant to end the middle ages trilogy
Killmayer was skilled at playing many instruments.
muffler hanger has been used by earl
The alliance included other Earls. 
Drummer Eric Dillon also played the guitar.
Guests on the album include multiple performers with numbers in their names.
The band Darkest Hour did a tour for their 5th album.
The The Royal Corps of Halberdiers was a very strong group of men.
Outro has instruments in it.
Dee Snider had many featured vocalists as a part of his second album.
The old man who had Harry on his knee was a good singer.
Earl Mountbatten of Burma is a live album.
The Final Blow has been listened by Earl.
Grave Digger only has nine studio albums
The album includes Queen's third single "Dime" featuring Wyclef Jean.
Kidsty Pike has been seen by earl.
The darkwave band had more than one singer
Headstones was their last album.
Piet Sielck only sings lead.
Keith Urban will be working alongside others.
Elizabeth Fraser is the lead vocalist on the tracks in the seventh album.
The Royal Corps of Halberdiers fought several battles in the "Sword of Honour" trilogy.
Piet Sielck only sings lead.
After being excluded from performing on the album, Hansi Kürsch was bitter.
Excalibur talks about the sword