Yes, that's correct, it's similar to the mechanisms NY Times guys were using and I've been focusing on the datasets to feed the CRF with as it's what drives the whole thing. This is the output I've got based on your example:
[
{
"unit": "cup",
"input": "1$1/2 cups seedless red or green grapes",
"name": "red grapes",
"qty": "1$1/2",
"comment": "seedless or green"
}
]
Don't hesitate to try the API out by pasting some examples to the white box on the site and pressing the "Try it out!" button, it's interactive :)