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Keywords are:  'cleric spell know alignment'

Spell: know alignment           Mana:  16  Wis: 28  Chr: 24  Lvl 24 Cler  (28%)
                                (obscure)   Requires: detect evil
                                Group: Cleric inquisition spellgroup
                                (Can Be Groupcast)

Usage:
cast know alignment <target>

The 'know alignment' spell is a spell used by clerics to determine
the overall alignment of a character or object.  All entities, from the
very good to the prime evil may have their alignment known via this spell.

Rooms can also have an alignment, which is usually determined by any
powerful sources of magic or creatures nearby. Ward evil and ward good
are both detected by this spell.