2533
The Immigration and Checkpoints Authority said it began a trial of the scanners Wednesday at its Woodlands and Tuas checkpoints to screen for people suffering from severe acute respiratory syndrome .
 The Immigration and Checkpoints Authority, it, its, people suffering from severe acute respiratory syndrome, its Woodlands and Tuas checkpoints, Woodlands, Tuas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 The Immigration and Checkpoints Authority, it, its, people suffering from severe acute respiratory syndrome, its Woodlands and Tuas checkpoints, Woodlands, Tuas