sisterCodex

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: sisterCodex

Indicates a sibling relationship where one codex or text is considered a sister counterpart to another, typically implying close similarity, shared origin, or parallel status.