Statement: the zakspeed 861 chassis was made in the years 1986 and 1987

Input Table: zakspeed

Step 1: f_select_row(row 1, row 2)

year	chassis	engine (s)	tyres	points
1985	zakspeed 841	zakspeed s4 t / c	g	0
1986	zakspeed 861	zakspeed s4 t / c	g	0
1987	zakspeed 861 zakspeed 871	zakspeed s4 t / c	g	2
1988	zakspeed 881	zakspeed s4 t / c	g	0
1989	zakspeed 891	yamaha v8	p	0

Step 2: f_select_column(year, chassis)

year	chassis	engine (s)	tyres	points
1986	zakspeed 861	zakspeed s4 t / c	g	0
1987	zakspeed 861 zakspeed 871	zakspeed s4 t / c	g	2

Step 3: simple_query()

year	chassis
1986	zakspeed 861
1987	zakspeed 861 zakspeed 871

Prompting LLM for the final answer... >>>

Prediction: NO