coordinations are interpreted as ranges

[Yoav Goldberg]

Describe the bug
5 and 6 kg is parsed as [Quantity(5.5, "Unit(name="kilogram", entity=Entity("mass"), uri=Kilogram)")]

Expected behavior

• between 5 and 6 kg should parse as [Quantity(5.5, "Unit(name="kilogram", entity=Entity("mass"), uri=Kilogram)")]
• 5 and 6 kg should parse as [Quantity(5, "Unit(name="kilogram", entity=Entity("mass"), uri=Kilogram)"), Quantity(6, "Unit(name="kilogram", entity=Entity("mass"), uri=Kilogram)")]

Additional context
The 5 and 6 x construction is common in, eg, the two groups were treated with 5 and 6 mg ... respectively

[Yoav Goldberg]

should be fixed by #204