Question 10 - Logical meaning of lone and some used together

What is the English meaning of following:

	lone p: some X | F

Zero or one p drawn from a subset of X, with F holding for one or more X.

At most one p drawn from a nonempty subset of X, with F holding for one or more X

One or zero p drawn from a nonempty subset of X or F.

One p drawn from one or more subsets of X such that F holds.