MET = {
if (activity == null) {
return "0.0";
}
if (grouped.get(activity).filter(d => d["('Description', '')"] == description).length == 0) {
return "0.0";
} else if (grouped.get(activity).filter(d => d["('Description', '')"] == description).length > 1) {
return "-1.0";
} else {
return grouped.get(activity).filter(d => d["('Description', '')"] == description)[0]["('2011 Compendium', 'METs')"]
}
}