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Immigration and Checkpoints Authority spokeswoman Ngoon Pei Ling said during the trial period the scanners would be placed at bus checkpoints , where passengers are already required to disembark for immigration purposes .
 Immigration and Checkpoints Authority, Immigration and Checkpoints Authority spokeswoman, Immigration and Checkpoints Authority spokeswoman Ngoon Pei Ling, passengers, bus checkpoints , where passengers are already required to disembark for immigration purposes, where, bus
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:
 Immigration and Checkpoints Authority, Immigration and Checkpoints Authority spokeswoman, Immigration and Checkpoints Authority spokeswoman Ngoon Pei Ling, passengers, bus checkpoints , where passengers are already required to disembark for immigration purposes, where, bus