Sentence:  During World War 2 , about 7.5 million persons were enrolled in courses organized under two special programs administered by state and local school authorities : ( 1 ) Vocational Education for National Defense , and ( <WSD>2</WSD> ) War Production Training . 
Meaning of the word marked with <WSD> tags:  the cardinal number that is the sum of one and one or a numeral representing this number