A row of houses have numbers 1 to 2 from left to right.

In each house lives a person with unique attributes in each of the following categories:

Nationalities: Norway and Spain.
Pets: cat and dog.
Hobbies: handball and tennis.

We also know the following:


1. The dog owner lives to the right of the cat owner. 2. The cat owner knows that herrings are fish. 3. The Spaniard lives to the left of the person who plays tennis. 4. The person with a master's degree in mathematics has a pet that is old for its species. 5. The person who plays tennis has been to Canada. 6. The person with a tattoo watches ski jumping. 7. The person with red hair has a sister.
{
    "object_1": [
        "nationalities_1",
        "pets_1",
        "hobbies_1"
    ],
    "object_2": [
        "nationalities_2",
        "pets_2",
        "hobbies_2"
    ]
}