Task: Named Entity Recognition
Input (English):  In contrast to the restricted tissue expression of gonadotropin and TSH receptors in gonads and thyroid , respectively , LGR4 is expressed in diverse tissues including ovary , testis , adrenal , placenta , thymus , spinal cord , and thyroid , whereas LGR5 is found in muscle , placenta , spinal cord , and brain .
Output (English): TSH receptors