Which varieties of apple typically have higher pesticide levels?
CREATE TABLE resultsdata15 (
    sample_pk number,
    commod text,
    commtype text,
    lab text,
    pestcode text,
    testclass text,
    concen number,
    lod number,
    conunit text,
    confmethod text,
    confmethod2 text,
    annotate text,
    quantitate text,
    mean text,
    extract text,
    determin text
)

CREATE TABLE sampledata15 (
    sample_pk number,
    state text,
    year text,
    month text,
    day text,
    site text,
    commod text,
    source_id text,
    variety text,
    origin text,
    country text,
    disttype text,
    commtype text,
    claim text,
    quantity number,
    growst text,
    packst text,
    distst text
)
SELECT T1.variety FROM resultsdata15 AS T2 JOIN sampledata15 AS T1 ON T1.sample_pk = T2.sample_pk WHERE T2.commod = "AP" GROUP BY T1.variety ORDER BY SUM(T2.concen) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Which varieties of apple typically have higher pesticide levels? ### Input: CREATE TABLE resultsdata15 (
    sample_pk number,
    commod text,
    commtype text,
    lab text,
    pestcode text,
    testclass text,
    concen number,
    lod number,
    conunit text,
    confmethod text,
    confmethod2 text,
    annotate text,
    quantitate text,
    mean text,
    extract text,
    determin text
)

CREATE TABLE sampledata15 (
    sample_pk number,
    state text,
    year text,
    month text,
    day text,
    site text,
    commod text,
    source_id text,
    variety text,
    origin text,
    country text,
    disttype text,
    commtype text,
    claim text,
    quantity number,
    growst text,
    packst text,
    distst text
) ### Response: SELECT T1.variety FROM resultsdata15 AS T2 JOIN sampledata15 AS T1 ON T1.sample_pk = T2.sample_pk WHERE T2.commod = "AP" GROUP BY T1.variety ORDER BY SUM(T2.concen) DESC LIMIT 1