We used the telescope for observing and taking pictures of the sun, the camcorder for pictures 
(We; used; the telescope; for observing and taking pictures of the sun, the camcorder for pictures) Context(We used,List([0, 7))):(We; used the telescope for observing; ) Context(We used,List([0, 7))):(We; used the telescope taking; pictures of the sun, the camcorder for pictures)
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used used the telescope for observing used the telescope taking
the telescope for observing and taking pictures of the sun, the camcorder for pictures
pictures of the sun, the camcorder for pictures