  In 1977, he made his first journey outside Africa, travelling to New York, where he had a show at the Maryknoll Sisters Ossining Center .
<clarity>   In 1977, he made his first journey outside Africa, travelling to New York, where he had a show at the Maryknoll Sisters Ossining Center .
 In 1977, he made his first journey outside Africa, travelling to New York, where he had a show at the Maryknoll Sisters ' Ossining Center in New York State .