rollingStockFormation

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: rollingStockFormation

Indicates the specific arrangement and sequence of rolling stock units (such as train cars or wagons) that are grouped together to form a complete train set.