Q: In this task you are given data in the tabular format and a question. Write the answer to the question based on the information in the table.
Table: ['', 'Name', 'Date', 'Location', 'County', 'Description']. ['1', 'Diamond Head', '', 'Honolulu', 'Oahu', 'State Monument']. ['2', "I'ao Valley", '', 'Wailuku', 'Maui', 'State Monument']. ['3', 'Kanaha Pond', 'June 1971', 'Kahului', 'Maui', 'Bird Sanctuary']. ['4', 'Ko'olau Range Pali', '', '', 'Oahu', '']. ['5', 'Makalawena Marsh', 'June 1972', 'North Kona', 'Hawai'i', 'Bird Sanctuary']. ['6', 'Mauna Kea', 'November 1972', 'Saddle Road', 'Hawai'i', 'U.S. state high point']. ['7', 'North Shore Cliffs', 'December 1972', 'Moloka'i', 'Maui', '']. Question: which national natural landmarks in hawaii are in oahu county?
A:
['Diamond Head', 'Ko'olau Range Pali']