<http://schema.org/description>
"The flower of the Butterfly Pea plant is used  particularly amongst the Peranakans as a food-colouring in confectionaries. For example, it is used in savoury Nonya bak chang or  rice dumplings  where it adds a tinge of blue to the rice."^^<http://www.w3.org/2001/XMLSchema#string>
<http://eresources.nlb.gov.sg/infopedia/articles/SIP_763_2004-12-20.html>