_:n6e71a0bad3d0492d9cd38687b7a34c9axb1
<http://schema.org/image>
<https://us.v-cdn.net/6030995/uploads/defaultavatar/nCCNNSPK1YM69.jpg>
<https://community.rapidminer.com/discussion/59129/how-to-use-regular-expression-to-extract-chemical-formula>