5919
The solid surface tensions of silver nanofluid ink were relatively low on PTFE , as results the printed lines were discontinuous .
 machanical property: surface tensions; material: silver; material: ink; material: PTFE; material: as
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: surface tensions, silver, ink, PTFE, as 
Answer:
 machanical property: surface tensions; material: silver; material: ink; material: PTFE; material: as