It was the spring of target, it was the winter of source, we had buy before us, we had sell before us.
It was the spring of physical, it was the winter of emotional, we had philosophical before us, we had intellectual before us.

Sell stimulates ideas about source but needs to reference target if the topic is buy-sell.
Intellectual stimulates ideas about emotional but needs to reference physical if the topic is human health.

It was the spring of q1o, it was the winter of q1s, we had q1e before us, we had q1r before us.
It was the spring of q1o, it was the winter of q1s, we had q1e before us, we had q1r before us.

q1r stimulates ideas about q1s but needs to reference q1o if the topic is q1n.
q1r stimulates ideas about q1s but needs to reference q1o if the topic is q1n.