Photosynthesis is a complex biological process that plants, some bacteria, and algae use to convert light energy into chemical energy stored in glucose, using water and carbon dioxide, while releasing oxygen as a byproduct. This can be broken down into several (subject, predicate, object) triples that reflect key aspects and steps of this process:

1. (Plants, absorb, sunlight)
2. (Chlorophyll, captures, light energy)
3. (Light energy, is converted, into chemical energy)
4. (Water molecules, are split, into oxygen and hydrogen)
5. (Oxygen, is released, into the atmosphere)
6. (Carbon dioxide, is absorbed, from the atmosphere)
7. (Carbon dioxide and hydrogen, are used, to form glucose)
8. (Glucose, serves as, energy source for plants)
9. (Chloroplasts, are the sites, of photosynthesis)
10. (Photosystem II, uses light energy, to extract electrons from water)
11. (Electrons, flow, from photosystem II to photosystem I)
12. (Photosystem I, uses electron energy, to reduce NADP+ to NADPH)
13. (ATP synthase, produces, ATP from ADP and inorganic phosphate)
14. (The Calvin cycle, converts, carbon dioxide to glucose using ATP and NADPH)
15. (Ribulose bisphosphate, is carboxylated, by Rubisco)
16. (Glucose, is synthesized, in the stroma of the chloroplast)
17. (Oxygen, is by-produced, in the light reactions)
18. (Energy from sunlight, is stored, in the chemical bonds of glucose)

These triples outline the main inputs and outputs of photosynthesis and the flow of energy and electrons through the two parts of photosynthesis: the light-dependent reactions and the Calvin cycle (light-independent reactions).
