Three statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

Some boxes are houses.

Some houses are tents.

Some tents are castles.

Conclusions:

I. Some castles are houses.

II. Some tents are houses.

III. Some castles are boxes