Definition: In this task, you are given a sentence or phrase in Xhosa. You must translate it to English in a way that is equivalent in terms of meaning and grammatically correct.

Positive Example 1 -
Input: Ulwakhiwo neempawu zentsinga zemifuno.
Output: Construction and characteristics of vegetable fibre cordage.

Positive Example 2 -
Input: Ukuphatheka kwentsinga zemifuno
Output: Handling of vegetable fibre cordage.

Negative Example 1 -
Input: Ukuphatheka kwentsinga ezenziwe ngabantu.
Output: Handling of man-made fibre cordage.

Negative Example 2 -
Input: Ulwakhiwo neendidi.
Output: Building and types.

Now complete the following example -
Input: AmaGrike amandulo nabafundi zinkwenkwezi bamaxesha emedi, babesele beqhelene nenyaniso yokuba umahluko ngokweside unokuthekelelwa ngokuqaphela ixesha lokubonakala okucacileyo kwesiganeko sasenyangeni.
Output: Ancient Greeks and medieval astronomers were already familiar with the fact that longitude differences could be determined by noting the local time of occurrence of some clear celestial event.