Assertion: sperm bank's sperm | /r/HasProperty | frozen for 21 years
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Source sentences:
text: It has been proposed that there should be an upper limit on how long frozen sperm can be stored, however a baby has been conceived in the UK using sperm frozen for 21 years.
text: It has been proposed that there should be an upper limit on how long frozen sperm can be stored; however, a baby has been conceived in the United Kingdom using sperm frozen for 21 years and andrology experts believe sperm can be frozen indefinitely.