Complex sentence: Ahmadiyya is an Islamic community in the Republic of Ireland under the spiritual leadership of the caliph in London, first formally registered in the country in 1992, during the era of the Fourth Caliphate.
Split into simpler sentences: Ahmadiyya is an Islamic community in the Republic of Ireland under the spiritual leadership of the caliph in London. The Community was formally registered in the country in 1992, during the era of the Fourth Caliphate.