id	keyword
ct-12587	semen
ct-12587	extender
ct-12587	sperm
ct-12587	stallion
ct-12587	milk
ct-12587	equine
ct-12587	motility
ct-12587	plasma
ct-12587	fertility
ct-12587	spermatozoa
ct-12587	sci
ct-12587	glycerol
ct-12587	theriogenology
ct-12587	antibiotics
ct-12587	yolk