"background" - key terms from Wikipedia

additional background	vocals
background
background	adaptation
background	and win means
background	check
background	checks
background	color
background	dancer
background	independence
background	information
background	investigation
background	knowledge
background	material
background	music
background	noise
background	painting
background	palette
background	performer
background	plane
background	plate
background	radiation
background	score
background	source
background	vocals
background	vocals on half
background	vocals on yellow submarine
best background	music
best background	score
black background
blue background
book as background	characters
captured background
cosmic background
cosmic background	radiation
cosmic microwave background
cosmic microwave background	radiation
deep background
desktop background
dvd case background
family background
fictional background
jewish background
lead and background	vocals
natural background	radiation
social background
solo and background	vocals
used as background	music
vocals and background
white background
yellow background