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<http://webisa.webdatacommons.org/390946647>	<http://www.w3.org/ns/prov#value>	"Referring now to FIG. 2a, the mouthpiece 20 comprises an upstream section 22 and a downstream section 25 of plastic material, such as polystyrene, and which includes annular flanges 26 and 28, respectively." .
<http://webisa.webdatacommons.org/390946647>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/461694047>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/390946647> .