About: http://webisa.webdatacommons.org/329482522

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I do not think it is possible in the state of our knowledge.The differences between the sperm (Y is a bit smaller than X) are not significant enough that a simple membrane could differentiate between the 2 kind.
http://www.w3.org/ns/prov#wasQuotedFrom	biology-online.org