source: [□=□] □
destination: [lemma=□] □
spec: During his junior faculty years in Boston , he discovered two important endogenous agents that stimulate airway mucin secretion - neutrophil elastase and ATP . After those three days , the employee may opt to use his / her vacation leave to extend his / her time out of the office , but this would need to be approved by the employee ’ s supervisor just like any other leave requests . I ' cut down my work hours because I wanted to be home during the daytime hours when he was most active . If an employee becomes ill or disabled while on vacation , his / her vacation leave shall be changed to sick leave , for the period of illness or disability , upon satisfactory notification to the employee 's supervisor .