Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla A kwanan nan, fashewar 1991 na Mount Pinatubo, wani stratovolcano (wanda yake a cikin Philippines) ya sanyaya yanayin duniya na kimanin shekaru 2 zuwa 3.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Kwanan nan, fashewar 1991 na Mount Pinatubo, wani stratovolcano (wanda yake a cikin Philippines), ya sanyaya yanayin zafi na duniya na kimanin shekaru 2 - 3, ya katse yanayin dumamar duniya wanda ya kasance a bayyane tun daga 1970. "