<http://schema.org/recipeIngredient>
"Lemon wedges or &lt;span class='ingredient'&gt;vinegar&lt;/span&gt; (optional)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cookstr.com/recipes/new-south-stir-fry-of-hearty-greens-with-garlic/comments>