Egypt did not use poison gas against Yemen in the 60's because of Israel.

"Results": [
    {
        "TypeName": "LOC",
        "Text": "Yemen",
        "Start": 37,
        "End": 42
    },
    {
        "TypeName": "LOC",
        "Text": "Israel",
        "Start": 66,
        "End": 72
    }
]