Task: Named Entity Recognition
Input (English):  We performed a blind chromosomal analysis on G2 - phase lymphocytes from 7 unrelated A - T patients , 13 obligate A - T heterozygotes ( parents of the patients ) , and 14 normal controls following X - irradiation with 1 Gy in order to evaluate this cytogenetic method as a tool for detection of ATM carriers .
Output (English): A - T