tokens: ['If', 'the', 'UE', 'supports', 'AGb', 'mode', 'and', 'BSS', 'packet', 'flow', 'procedures', 'a', 'network', 'supporting', 'mobility', 'from', 'S', 'mode', 'to', 'AGb', 'mode', 'shall', 'include', 'this', 'IE']