id	keyword
ct-10080	yolk
ct-10080	egg
ct-10080	semen
ct-10080	soybean
ct-10080	extender
ct-10080	sperm
ct-10080	motility
ct-10080	egg yolk
ct-10080	extract
ct-10080	pregnancy
ct-10080	bull
ct-10080	rate
ct-10080	cows
ct-10080	study