key value
n_primary_alignments 6
n_secondary_alignments 2
n_supplementary_alignments 2
n_unmapped_reads 0
n_reversed_reads 3
align_len_mean 12
align_len_max 20
align_len_min 6
align_len_median 12
align_len_n50 15
seq_len_mean 12
seq_len_max 20
seq_len_min 6
seq_len_median 12
seq_len_n50 15