In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

[Q]: Sentence: Synostoses unite the sacral vertebrae that fuse together to form the adult sacrum. Question: Synostoses unite the sacral vertebrae that fuse together to form the what?
[A]: adult sacrum

[Q]: Sentence: Particles of sand and rock are carried by longshore drift. Question: Particles of sand and what other substance are carried by longshore drift?
[A]: rock

[Q]: Sentence: Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometries. Question: Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized what?
[A]:
stoichiometries