Instructions: In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Input: The Hawaiian tropical dry forests are a tropical dry broadleaf forest ecoregion in the Hawaiian Islands. They cover an area of 6600 km2 on the leeward side of the main islands and the summits of Ni ihau and Kaho olawe. These forests are either seasonal or sclerophyllous. Annual rainfall is less than 127 cm and may be as low as 25 cm ; the rainy season lasts from November to March. Dominant tree species include koa ("Acacia koa"), koai a ("A. koaia"), akoko ("Euphorbia" spp.), ohi a lehua ("Metrosideros polymorpha"), lonomea ("Sapindus oahuensis"), mamane ("Sophora chrysophylla"), loulu ("Pritchardia" spp.), lama ("Diospyros sandwicensis"), olopua ("Nestegis sandwicensis"), wiliwili ("Erythrina sandwicensis"), and iliahi ("Santalum" spp.). Endemic plant species in the dry forests include hau hele ula ("Kokia cookei"), uhiuhi ("Caesalpinia kavaiensis"), and "Gouania" spp. The palila ("Loxioides bailleui"), a Hawaiian honeycreeper, is restricted to this type of habitat. Question: Hawaiian tropical dry forests have a dominant tree species of which tree in the pea family? Answer: Acacia koa
Output:
Dominant tree species include koa Acacia koa, koai a A. koaia, akoko Euphorbia spp.