929
Modified Kelly and Tyson model proposed for fibers shorter and longer than the critical fiber length with considering fiber orientation , as follows .
 concept or principle: model; material: fibers; machanical property: critical fiber length; engineering feature: fiber orientation; material: as
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: model; material: fibers; machanical property: critical fiber length; engineering feature: fiber orientation; material: as