The girl is Julie Mason.

Her name is Julie Mason.

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The boy is James Wilson.

His name is James Wilson.

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James is British whereas Julie is American.

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Julie's mother is on the plane.

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Julie's father is not on the plane.

Julie's father is in Washington DC.

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Washington DC is the capital of the United States.

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James's parents are not on the plane.

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Molly offers a drink to the children.

Molly offers a drink to James and Julie.

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Julie and James accept the drink.

The children accept the drink.